The Finder displays nearby Computers and Devices in the left column whenever a network connection is present.
Sometimes we let clients use our network when we discuss projects in meetings (aka they bring their Notebooks along). In some cases we would prefer if they couldn't see all the machines and devices in our network.
Is there a way to prevent the discovery of other network clients on the infrastructure side? I tried blocking Bonjour traffic, however, the Macs are still able to see who's around?