Hi all,

The requirement is simple, if anyone know any module similar, I will very appreciate your update.

The situation is described below,
When a nomral registered user completes an application form, which stores additional user info, in another Database table different from user_profiles maybe, he then will automatically be changed to a member of another user group.

I have not found any useful words about this so far. Thanks all in advance, for your help.

The only thing I know of that is close is
MC Subscriptions
May be this could be customised to your needs?