Not that I know if it is possible to do as you ask, but we found it is all about educating your members as to where they post things...A good way of course is to use a set of prefixes within forums.Explain to them what you are trying to achieve and make sure your moderators are on the ball....Members will soon cotton on when they see their posts being moved about and prefixes being added to threads.
http://www.shrimperzone.com/vb/forum.php
Hope that helps.