[Freeswitch-users] How to set channel variable per SIP profile

Hi, Subject says it all. Is there a way to set channel variable for all calls passing through a SIP profile? For example, I want all calls authorized with ACL and hitting SIP profile to have country=foo. This has to be done before hitting the dialplan. There is a bunch of "params" in the SIP profile, but these aren't channel variables. Thanks! -Victor