Calling-Station-ID

Is there anyway that I can rewrite the Calling-Station-ID to the name of the PC instead of the MAC address? This table can be found in LDAP or even in DHCP. Is there a way to call an external program that will provide the rewrite rules such that the log shows: Login OK: [username] (from client switch port 0 cli PCName) Instead of: Login OK: [username] (from client switch port 0 cli 00-11-22-33-44-55) Thanks! Stefan