multiple MAC in calling-station-id

Just a question... we use 'Calling-Station-Id' for authenticate agains MAC address (and username and passwd) can i use multiple 'Calling-Station-Id' if some user account has, let's say 3 laptops.. ?? or is there an other way to link multiple mac addresses to a user account ? ------- users ------ "gebruiker" User-Password == "12345", Calling-Station-Id == "00166f980e78" "00166f97d99d" "testcase1" User-Password == "12345", Calling-Station-Id == "00166f980e78 , 00166f97d99d" "testcase2" User-Password == "12345", Calling-Station-Id == "00166f980e78", Calling-Station-Id == "00166f97d99d" ------------------- dunno somthing like this ?? Cheers Collen...