I am looking for perl modules that can connect and disconnect the WiFi connection between a PC and access points in a multiple access point coverage area.

You can break the association between a wireless card (in a PC) and an access point in several ways, ranging from pulling the power on the PC (not very effective against laptops) to pulling the power on the access point (effective, but brutal). Either can be done by Perl using X10 protocols. I suspect, though, that you're looking for something different. Could you be more specific? What problem are you attempting to solve?