Need Multiple Private Forums

If what I need requires any amount of coding, please consider this a request for help or a bid request

I’m building a private site with paid registration required, and no public access or access by unregistered visitors.
If I want 4 different user groups to be able to buy access, each with his/her own forum: Ideally, a user wouldn’t see private forums that he/she doesn’t belong to, but could see 3 different forums that all user groups can share.

1. Can I have four different registration routines? With each routine producing one of the four different user types? (As you can tell, I don't know where usertype is set.)
‘type1’users, ‘type2’users, ‘type3’users, ‘type4’users

OR:

2. If I add a choice of the four to a registration step, what would I do to restrict access of each to their own separate private forum?

Example:

All users will be members, and have access to many, if not, most of the resources of the forum.

All users will have a secondary attribute, membership access:

Registered User and “Category#1” (private access to “lforum1”)

Registered User and “Category2” (private access to “forum2”

Registered User and “category3” (private access to forum3)

Registered User and “Category4” (access to forums 1 and 3)

I know I could add the second attribute manually, but how can I add it and have it all done automatically through the registration process?

1. You have have several different subscription levels

I'm tackling a similar issue but with free registration

We're going to hack something to have a combo of password and groups.

This is in vB. Forum permissions, user groups and subscriptions.

Thanks for the tips. I've used your suggestions and I think I have something that will work.

Good to know .. you got that fixed!