How to allow only an unique MAC address from a cisco switch port and block all the other MAC addresses?

Basically i need to allow only my managers laptop connecting to a conference room port to access the network and block others who try to connect using this port when its free (expecting a solution something like allowing managers mac address from the port and blocking all the other mac addresses)

tudou 見れない 2013

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).