Board Thread:General Discussion/@comment-26330800-20150812212518/@comment-26009167-20150812215949

To add to what Josephyr said, unless the other person is a thread mod or an admin, there is unfortunately no way to give the controls the original poster gets to other users - at least, not with how Wikia's coded. If you really need to, you can have the new "owner" simply make a new thread and link to the old one in it.

If you think this kind of feature may help others in the future, though, you can always submit it as an idea to Special:Contact/feedback. :)