GPO on P2P network

I have a P2P network with 3 computers running XP Pro. I am using GPO to set user configurations, but they are applying to all users. Is it possible to create different GPO settings for each user on a P2P network? If so, what are the steps?
I know this can be done in a client/server network using OUs; don’t know if it’s possible in P2P network.
I’d even be willing to do the GPOs one computer at a time, if I can create different settings for different users.
Thanks very much.
John Lemmon