So, I was reading the general rules to make an The Sims speedrun, and got confused about the sixth rule "You may have custom content on your computer, however you are not allowed to use any of it during the run." Does this includes literally any custom content or just content that could affect gameplay or something like that?

Giving an example of each one exactly, using an mod to make your Sim be an assassin change the gameplay so obviously it cannot be used, but one that adds Waluigi's model to the game would not do anything besides change the Sim's model, so it wouldn't affect the gameplay at any form

I'm sorry if it's a dumb question, but I thought it was better to ask just to be sure

So, I don't know if it's a dumb question or not, but I was wondering if is there any rule about doing an MP6 run in Multiplayer. Are there any category that you can do it or it's just against the rules?