You can now create your own mods for Northgard. When you create a new mod, it is saved in local by default and you will be the only one who can test it. To make your mod available for everyone, you will need to upload it to Steam Workshop.
The multiplayer in Northgard is based on a simple host/client architecture. The host machine, from which a game was created, is responsible for managing all gameplay related actions, like moving units, activating abilities, controlling AI and counting scores.