Thanks for the quick reply.
On the UTM (Untangle, also acting as DHCP) the virtual addresses assigned registered with the same mac address as the WMS NIC. Thus registering multiple IP's as one mac address. Under running ipconfig on the client it showed the primary IP and then a deprecated IP (for the client) but no mac address for the client.
Since WMS was the host I thought it would control the virtual IP assignments but perhaps this is better question for nComputing and how to find what the client mac address's are? Although that leads me back to the DHCP server and reading multiple IP's for one mac address.
(BTW there is no mac address printed on the x550 thin client)