Port forwarding multiple devices through one port

[WesL01]

I have a Netgear nighthawk mesh network system and im trying to open port 44158 so two ore more devices can work through it. When I add one it works fine, but when I got and try to add the sceond it says that it is already in use. Is there a way to open a port so multiple devices can use it or can you only assign one local ip to the local port?

[schumaku]

AS stated on another thread: Port forwarding for one port can be done to one LAN IP (of a device, e.g. a computer, not the router LAN).

Issue is related to Nighthawk Mesh System - not to the Genie App (very legacy...).