Need help with server question

Hey there, i’ve a question regarding server arcitecture…

Let’s say i’ve a general gamemode for the world. But, i want to make an dungeon instances, just like in world of warcraft or similar games. So, it’s basically looks like this:

Game World, has an entrance to the dungeon for the party of players. For each party of players server creates new instance of a dungeon. So other parties of players didn’t see each other.

Is it possible to achieve without rewriting the rest of the unreal network core?

Best regards, Jesse.