NAS payment and free. It's possible?

I have some public NAS(free without pay) and some payment NAS (hotel).
It’s possibile to ensure that a “free user” can browse on certain NAS (free) and not on others(hotel)?
As a paying user navigates on everyone?

NAS is mikrotik and have a central freeradius.

Yes. In the radius radcheck table, you can enter attribute=WISPr-Location-Name with value=free for users that are using the free system. Then in the free routers:
/ip hotspot profile set 0 radius-location-name=free

In the paid routers:
/ip hotspot profile set 0 radius-location-name=paid

Users without the WISPr-Location-Name assigned can login anywhere.

Thanks a lot.

Works great!