Hello, Am I allowed to speedrun in a Linux virtualmachine?

it shouldn't make a difference. why would you do it tho

not sure why you would... i mean sure

You're technically allowed to use any OS in any kind of machine. Performance will be affected though.

i thought it said no emulators when you submit a run

true in a way a vm is a emulator

Emulators being of the game, not of the machine. Virtual machines should be fine, although I highly do not recommend it as it will greatly reduce your performance.