"The five space agencies involved in the space station — from the United States, Russia, Japan, Europe and Canada — have long-established procedures to handle any jurisdictional questions that arise when astronauts of various nations are orbiting Earth together."

https://www.nytimes.com/2019/08/23/us/nasa-astronaut-anne-mc...

What do you mean? People are governed by the laws of their respective countries per signed treaties, as explained in the article.