limiting profiles to user groups Can profile fields be limited to user groups in backend? It seems that if you want required front end fields for users registering then admins in backend have to have these as compulsory when creating admin accounts.
Custom fields are attached to Users, not User Groups.

Seems like you'd be able to do what you want on the template side, though.  i.e. something like "if user is in group A, show field B, otherwise hide it".

Or perhaps something like the Reasons plugin is the way to go, which adds conditionals to fields/field layouts.