Thanks ewaite for your reply.
Honestly i’ve not understand your suggestion, that’s not so easy for not firewall specialist like me.
The be more clear on what i need, i forgot to say that i have only one access point with radius authentication. Than i have two users, one need to access the lan on the principal gateway. The second (like a guest) need to exit directly on internet trough the second gateway.
Is there a way to route a radius user to a specific gateway?