EX2200 - Block a MAC address?

Is there a way to block a specific MAC address on an EX2200 switch? I ask because we've recently detected an IP conflict on our network, and I traced the rogue device's MAC address down to the exact switch port, but we're unsure what is plugged into the port. We're suspecting it may be a a wireless access point, and if so, we don't want to just shut the port or unplug it. We also don't want to enable MAC limiting because I believe that works by explicitely -allowing- MAC addresses through port security, not allowing -all- and explicitely denying -one-. 

Thanks for the assistance!