Register and go to a specific usergroup on select a option

[Kanustep]

Hiz,

I would like to set a function on registration so if users select the proper option from a drop down menu they will be included into a user group.

For example:
>> Company (go to company_usergroup)
>> Freelancer (go to freelance_usergoup)
>> Normal user (go to register_members)

Is this possible? is there a mod to simplify this?

thanks