Features like "access control" are done higher up on the OSI model then layer 2. Access control is modification of the devices firewall. If you configure a router as a AP, you are disabling it's firewall, NAT and other items above layer 2, so there is no access to control. If you have a AP connected to a router, and you are looking to modify what services can run on that router, then access control needs to be modified on the router(DIR-632?) and not the AP(DIR-855)