[Serusers] radius authentication with ip address of a user

Hi, I have installed ser and freeradius into same machine. everything is working fine. i have created users at the freeradius. but while creating a user, in the user information i had to use the ip of the SER not the ip of the user gateway(a sip gateway) I mean i want to register the user according to its username , password and ALSO IP. my user`s ip: 83.100.100.23 my SER ip: 212.175.10.36 when i edit user file for freeradius and when i write this: myuser(a)83.100.100.23 for user name it does not work but when i write myuser(a)212.175.10.36 then it can authenticate. but this is unusefull for me at the moment. I must be authenticated according to user`s ip, not according to SER`s ip please help meee thanks a lot --------------------------------- Relax. Yahoo! Mail virus scanning helps detect nasty viruses!