We have BVIs with the corresponding subinterfaces.There is no possibility to configure CGMP on a BVI. How to handleIGMP Requests on the L3 Interface of the router (BVI)?

Is there a possibility to identify a WLAN user on the wired network?How can I make sure, that nobody places a rogue AP in the network and get access to the wired network or a employee puts in a WLAN card and allows anon-employee to access to the net...