check ldap users with different client IP's

hello all I've used freeradius as the front of a LDAP server. Here, I want to allow different access rights for each LDAP group & client ip address For example below: user X in LDAP group A, from ip IP-A user Y in LDAP group B, from ip IP-B if the user is from IP-A and user in LDAP group A, then send Accept-Accept packet How do this be done with freeradius? Thanks a lot