Is there a way to restrict access to the WebUI?

Hi all,

Some of our customers want to restrict access to the Web UI from the local networks of the socket.

However, even though I write LAN FW rules, the local IPs will respond to the HTTPs request from every network on the LAN port, even if that is a guest network.

Is there any way to restrict access to the WebUI?
If not, isn't such a configuration necessary? 

Thank you,