I would imagine the MAC address search function would do... but not sure if wildcards or incomplete MAC ID lookups are valid in UDT. Not only that, but the list for D-Link was a crazy amount of starting bits, whereas linksys only had a few.... YMMV, but it's a thought.
I'm not sure that UDT is the best thing for this... I'd be running NMAP scans (or something similar) on the network looking for them. NMAP can fingerprint devices and identify what they are. See Chapter 8. Remote OS Detection on the NMAP website for more details.
At most places these scans are done [and approved] by the security operations team; transgressors get a visit from the Security Officer...