said by plencnerb:Since most routers (both Wired and Wireless) log the MAC address of each system, you can then go through all the ones that were connected.
Most only log the MACs of active devices.
said by plencnerb:From there I would think you would be able to do some kind of search on the MAC, to try to figure out who the real "thief" is, and then track that person (or people) down.
You cannot find out who has a certain MAC. Especially when spoofing a MAC is trivial and someone with "proper intentions" may spoof it to something else each time... Yes, I can make my MAC appear as 00:00:00:00:00:01...