User-Name containing a $

Is there a way to tell radius to not do something based on the User-Name containing a "$" ? I am doing dynamic VLAN assignment and I'd like to skip that for computer logins. I looked at unlang and I didn't see a way to check for a character in a username. Tena Gore Senior Network Administrator Technology Support Services Fairfield-Suisun Unified School District tenag@fsusd.org 707-399-1200