VPN Devices are devices connecting to your network from the WireGuard or AmneziaWG VPN Server. Enabling Device Isolation can block it from communicating with other local devices.
Requires App 1.69.3, which is currently in beta. Learn more about how to join beta here: https://help.firewalla.com/hc/en-us/articles/53877722149907-Firewalla-App-Release-1-69-3-AmneziaWG-VPN-Client-Local-Device-Rules-Switch-Enhancements-and-more