Thank you for clarification.

Well, is this for some reason? I guess it could be possible to commit only diff requested for review and keep all other changes as uncommitted (I know it's not possible with svn straightforward but seems TortoiseSVN client has done it http://tortoisesvn.net/docs/release/TortoiseSVN_en/tsvn-dug-commit.html#tsvn-dug-commit-restore).
Another option would be to prohibit commit saying changeset is wider then requested for review.