diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -4180,6 +4180,7 @@
     'PhabricatorProjectTriggerEditor' => 'applications/project/editor/PhabricatorProjectTriggerEditor.php',
     'PhabricatorProjectTriggerInvalidRule' => 'applications/project/trigger/PhabricatorProjectTriggerInvalidRule.php',
     'PhabricatorProjectTriggerListController' => 'applications/project/controller/trigger/PhabricatorProjectTriggerListController.php',
+    'PhabricatorProjectTriggerManiphestOwnerRule' => 'applications/project/trigger/PhabricatorProjectTriggerManiphestOwnerRule.php',
     'PhabricatorProjectTriggerManiphestPriorityRule' => 'applications/project/trigger/PhabricatorProjectTriggerManiphestPriorityRule.php',
     'PhabricatorProjectTriggerManiphestStatusRule' => 'applications/project/trigger/PhabricatorProjectTriggerManiphestStatusRule.php',
     'PhabricatorProjectTriggerNameTransaction' => 'applications/project/xaction/trigger/PhabricatorProjectTriggerNameTransaction.php',
@@ -10319,6 +10320,7 @@
     'PhabricatorProjectTriggerEditor' => 'PhabricatorApplicationTransactionEditor',
     'PhabricatorProjectTriggerInvalidRule' => 'PhabricatorProjectTriggerRule',
     'PhabricatorProjectTriggerListController' => 'PhabricatorProjectTriggerController',
+    'PhabricatorProjectTriggerManiphestOwnerRule' => 'PhabricatorProjectTriggerRule',
     'PhabricatorProjectTriggerManiphestPriorityRule' => 'PhabricatorProjectTriggerRule',
     'PhabricatorProjectTriggerManiphestStatusRule' => 'PhabricatorProjectTriggerRule',
     'PhabricatorProjectTriggerNameTransaction' => 'PhabricatorProjectTriggerTransactionType',
diff --git a/src/applications/project/controller/PhabricatorProjectBoardViewController.php b/src/applications/project/controller/PhabricatorProjectBoardViewController.php
--- a/src/applications/project/controller/PhabricatorProjectBoardViewController.php
+++ b/src/applications/project/controller/PhabricatorProjectBoardViewController.php
@@ -621,19 +621,26 @@
       $panel->setCards($cards);
       $board->addPanel($panel);
 
+      $trigger = null;
+      if ($column->canHaveTrigger()) {
+        $trigger = $column->getTrigger();
+        if ($trigger) {
+          foreach ($trigger->getTriggerRules() as $rule) {
+            $rule->setViewer($viewer);
+          }
+        }
+      }
+
       $drop_effects = $column->getDropEffects();
       $drop_effects = mpull($drop_effects, 'toDictionary');
 
       $preview_effect = null;
-      if ($column->canHaveTrigger()) {
-        $trigger = $column->getTrigger();
-        if ($trigger) {
-          $preview_effect = $trigger->getPreviewEffect()
-            ->toDictionary();
+      if ($trigger) {
+        $preview_effect = $trigger->getPreviewEffect()
+          ->toDictionary();
 
-          foreach ($trigger->getSoundEffects() as $sound) {
-            $sounds[] = $sound;
-          }
+        foreach ($trigger->getSoundEffects() as $sound) {
+          $sounds[] = $sound;
         }
       }
 
diff --git a/src/applications/project/controller/trigger/PhabricatorProjectTriggerEditController.php b/src/applications/project/controller/trigger/PhabricatorProjectTriggerEditController.php
--- a/src/applications/project/controller/trigger/PhabricatorProjectTriggerEditController.php
+++ b/src/applications/project/controller/trigger/PhabricatorProjectTriggerEditController.php
@@ -272,6 +272,10 @@
     $rule_list = array_values($rule_list);
 
     $type_list = PhabricatorProjectTriggerRule::getAllTriggerRules();
+
+    foreach ($type_list as $rule) {
+      $rule->setViewer($this->getViewer());
+    }
     $type_list = mpull($type_list, 'newTemplate');
     $type_list = array_values($type_list);
 
diff --git a/src/applications/project/controller/trigger/PhabricatorProjectTriggerViewController.php b/src/applications/project/controller/trigger/PhabricatorProjectTriggerViewController.php
--- a/src/applications/project/controller/trigger/PhabricatorProjectTriggerViewController.php
+++ b/src/applications/project/controller/trigger/PhabricatorProjectTriggerViewController.php
@@ -21,6 +21,10 @@
       return new Aphront404Response();
     }
 
+    foreach ($trigger->getTriggerRules() as $rule) {
+      $rule->setViewer($viewer);
+    }
+
     $rules_view = $this->newRulesView($trigger);
     $columns_view = $this->newColumnsView($trigger);
 
@@ -166,6 +170,7 @@
 
     $rows = array();
     foreach ($rules as $rule) {
+      $rule->setViewer($viewer);
       $value = $rule->getRecord()->getValue();
 
       $rows[] = array(
diff --git a/src/applications/project/trigger/PhabricatorProjectTriggerManiphestOwnerRule.php b/src/applications/project/trigger/PhabricatorProjectTriggerManiphestOwnerRule.php
new file mode 100644
--- /dev/null
+++ b/src/applications/project/trigger/PhabricatorProjectTriggerManiphestOwnerRule.php
@@ -0,0 +1,106 @@
+<?php
+
+final class PhabricatorProjectTriggerManiphestOwnerRule
+  extends PhabricatorProjectTriggerRule {
+
+  const TRIGGERTYPE = 'task.owner';
+
+  public function getSelectControlName() {
+    return pht('Assign task to');
+  }
+
+  protected function assertValidRuleValue($value) {
+    if (!is_array($value)) {
+      throw new Exception(
+        pht(
+          'Owner rule value should be a list, but is not (value is "%s").',
+          phutil_describe_type($value)));
+    }
+
+    if (count($value) != 1) {
+      throw new Exception(
+        pht(
+          'Owner rule value should be a list of exactly one user PHID, or the '.
+          'token "none()" (value is "%s").',
+          implode(', ', $value)));
+    }
+  }
+
+  protected function newDropTransactions($object, $value) {
+    if (head($value) == PhabricatorPeopleNoOwnerDatasource::FUNCTION_TOKEN) {
+      $phid = null;
+    } else {
+      $phid = head($value);
+    }
+
+    return array(
+      $this->newTransaction()
+        ->setTransactionType(ManiphestTaskOwnerTransaction::TRANSACTIONTYPE)
+        ->setNewValue($phid),
+    );
+  }
+
+  protected function newDropEffects($value) {
+    return array(
+      $this->newEffect()
+        ->addCondition('owner', '!=', $value)
+        ->setContent($this->getRuleViewDescription($value)),
+    );
+  }
+
+  protected function getDefaultValue() {
+    return null;
+  }
+
+  protected function getPHUIXControlType() {
+    return 'tokenizer';
+  }
+
+  protected function getDatasource() {
+    return id(new ManiphestAssigneeDatasource())
+      ->setViewer($this->getViewer())
+      ->setLimit(1);
+  }
+
+  protected function getPHUIXControlSpecification() {
+    $template = id(new AphrontTokenizerTemplateView())
+      ->setViewer($this->getViewer());
+    $template_markup = $template->render();
+
+    $datasource = $this->getDatasource();
+    return array(
+      'markup' => (string)hsprintf('%s', $template_markup),
+      'config' => array(
+        'src' => $datasource->getDatasourceURI(),
+        'browseURI' => $datasource->getBrowseURI(),
+        'placeholder' => $datasource->getPlaceholderText(),
+        'limit' => $datasource->getLimit(),
+      ),
+      'value' => 'wang',
+    );
+  }
+
+  public function getRuleViewLabel() {
+    return pht('Change Owner');
+  }
+
+  public function getRuleViewDescription($value) {
+    if (head($value) === PhabricatorPeopleNoOwnerDatasource::FUNCTION_TOKEN) {
+      return pht('Unassign task.');
+    } else {
+      return pht(
+        'Assign task to: %s.',
+        $this->getViewer()
+          ->renderHandleList($value)
+          ->setAsInline(true)
+          ->render());
+    }
+  }
+
+  public function getRuleViewIcon($value) {
+    return id(new PHUIIconView())
+      ->setIcon('fa-user', 'green');
+  }
+
+
+}