I understand your question, but couldn't you do the same by applying categories to each contact and then using filters to view your personal contacts? That's what I do.
Posted from my CrackBerry at wapforums.crackberry.com
that's exactly what i want to do - the exchange server that my blackberry is connected to is shared amongst three different users; my customer services team, my business partner and myself. I want to keep a personal address book on my blackberry as well as the address book on the exchange
do any of the third party contact management programs supply this functionality?