Unfortunately online multiplayer on NG-Amigas won't happen, because a "black-boxed" commercial network gaming library has been chosen for that task.
In theory I could write a networking system myself, but sorry, no. This would also require a server to be set up, of course it would be incompatible to the other versions of the game, etc. And I really already spent much much much more time (and still have to) with that port than anticipated, due to the facts mentioned above.
Maybe you should stay away from this kind of porting crap when you get your hands clean of these couple of ports you've promised into

How many original games you'd be able to produce in the time used to these

Those "modern" coders just don't have a clue what's reasonable...