Please explain your feature request to the best of your abilities:

The suggestion is basic, but very useful, just as towny ports does not allow users to go to enemy ports, it should also allow users to configure that they can only travel to ally ports, this is very useful for servers that use many towns that probably are empty and don't want players to be able to go to neutral nations that are close to their enemies, for example

The following may be more complicated, but it would be good if Towny Port can also identify the distance of the town you want to travel to and that you can configure the trip and cooldown to be higher, or not allow you to travel directly, now. It doesn't make much sense that on a geopolitical server, a person from Russia can travel to Spain in a normal way

TownyPorts/TownyWayPoints is not one of my plugins but you could try their repo: https://github.com/Mvndi/TownyWaypoints/issues