How to prevent static IP addresses in DHCP environment

I have a DHCP server running on SLES 10 and I need to prevent certain client workstations from using static IP addresses.

The idea is to block access to the internal network resources (apart of Internet access) to certain IP addresses. Those addresses would be ‘given’ by DHCP server.

I cannot lock down access to network properties on those client machines as they are computers of guests visiting our office.

Let’s say that my DHCP server’s scope is 192.168.0.11 – 192.168.0.254 (addresses 1-10 are statically assigned and in use).

Is there a way to set up DHCP server so it will force dynamic addresses in its scope?