Can you work with 2 monitors and 2 keyboards / mice at the same time?

Is it possible to work in twos with my 2 connected monitors on one pc? Would like to work with a colleague on a software program without having to sit down at his laptop.

If you have 2 PCs this is possible. But if not, then not.

So to my knowledge not because it is just a pc

Theoretically… If you set up a VM, and then assign a keyboard, mouse and screen to it.

In practice, however, I haven't tried something like that yet, for reasons of nonsense in my opinion.

Yes, that is possible.

Even 7 people. That's the highest thing I know.

Yes, but a virtual environment would have to be set up. This can't be clarified without and under license law if it is used for business.