ldap group filter by different incoming IPs

Hello all, We want to do a sceranio like below: (Pre-requisties: a radius server RD, a ldap backend LD, and 2 unix clients CA and CB with different IPs) CA sends user auth requests to RD, RD would only send if the user is in ldap group A CB sends user auth requests to RD, RD would only send if the user is in ldap group B Is it possible for only one radius server to do this according to different incoming IPs? Thanks a lot stephon