Xaccess syntax..

Hello, I'm struggling a bit with XDMCP setup.. In Xaccess there's a setting for who's able to connect, either * for everyone and now the problem, as I can see in the docs, only domain-based syntax? F.x. *.comp.com etc.. Or a specific IP. I'd like to able to set it up for subnets based on ip, f.x. 192.168.456.0/24 or 192.168.456.* or similar but I can't see that this type of syntax is supported? Any hints? Anders Norrbring Norrbring Consulting