BuddyPress.org

PS: you can see it in action right here: http://www.minemusig.at/thenaughtydaughters/ -> go to “Profiltyp”, it’s a selectfield you have to check on registration and also works as a “role-selector”, too (if you want to know how, I can help). If you click on “Band” it shows you all other profiles of that type.