Index: src/applications/repository/query/PhabricatorRepositoryQuery.php
===================================================================
--- src/applications/repository/query/PhabricatorRepositoryQuery.php
+++ src/applications/repository/query/PhabricatorRepositoryQuery.php
@@ -10,6 +10,7 @@
   private $uuids;
   private $nameContains;
   private $remoteURIs;
+  private $anyProjectPHIDs;
 
   const STATUS_OPEN = 'status-open';
   const STATUS_CLOSED = 'status-closed';
@@ -76,6 +77,11 @@
     return $this;
   }
 
+  public function withAnyProjects(array $projects) {
+    $this->anyProjectPHIDs = $projects;
+    return $this;
+  }
+
   public function needCommitCounts($need_counts) {
     $this->needCommitCounts = $need_counts;
     return $this;
@@ -350,6 +356,12 @@
         PhabricatorRepository::TABLE_SUMMARY);
     }
 
+    if ($this->anyProjectPHIDs) {
+      $joins[] = qsprintf(
+        $conn_r,
+        'JOIN edge e ON e.src = r.phid');
+    }
+
     return implode(' ', $joins);
   }
 
@@ -398,6 +410,13 @@
         $this->nameContains);
     }
 
+    if ($this->anyProjectPHIDs) {
+      $where[] = qsprintf(
+        $conn_r,
+        'e.dst IN (%Ls)',
+        $this->anyProjectPHIDs);
+    }
+
     $where[] = $this->buildPagingClause($conn_r);
 
     return $this->formatWhereClause($where);
Index: src/applications/repository/query/PhabricatorRepositorySearchEngine.php
===================================================================
--- src/applications/repository/query/PhabricatorRepositorySearchEngine.php
+++ src/applications/repository/query/PhabricatorRepositorySearchEngine.php
@@ -12,6 +12,7 @@
     $saved->setParameter('hosted', $request->getStr('hosted'));
     $saved->setParameter('types', $request->getArr('types'));
     $saved->setParameter('name', $request->getStr('name'));
+    $saved->setParameter('anyProjectPHIDs', $request->getArr('anyProjects'));
 
     return $saved;
   }
@@ -57,6 +58,11 @@
       $query->withNameContains($name);
     }
 
+    $any_project_phids = $saved->getParameter('anyProjectPHIDs');
+    if ($any_project_phids) {
+      $query->withAnyProjects($any_project_phids);
+    }
+
     return $query;
   }
 
@@ -68,6 +74,16 @@
     $types = $saved_query->getParameter('types', array());
     $types = array_fuse($types);
     $name = $saved_query->getParameter('name');
+    $any_project_phids = $saved_query->getParameter('anyProjectPHIDs', array());
+
+    if ($any_project_phids) {
+      $any_project_handles = id(new PhabricatorHandleQuery())
+        ->setViewer($this->requireViewer())
+        ->withPHIDs($any_project_phids)
+        ->execute();
+    } else {
+      $any_project_handles = array();
+    }
 
     $form
       ->appendChild(
@@ -81,6 +97,12 @@
           ->setLabel(pht('Name Contains'))
           ->setValue($name))
       ->appendChild(
+        id(new AphrontFormTokenizerControl())
+          ->setDatasource('/typeahead/common/projects/')
+          ->setName('anyProjects')
+          ->setLabel(pht('In Any Project'))
+          ->setValue($any_project_handles))
+      ->appendChild(
         id(new AphrontFormSelectControl())
           ->setName('status')
           ->setLabel(pht('Status'))