How to make an online multiplayer game with each player spawned in a separate level

I’m working on a game that involves a lot of mechanics that seem very complex to me. One of those mechanics involves all of the players starting out in entirely separate areas. I have created several separate levels already. However, I am unsure of how I would create a mechanic where players assigned certain numbers (player 1, player 2, etc.) would start out in, say, level 1 for player 1, level 2 for player 2, and so on.