How to clone steam client?

There is a feature on the Android (mobile master race) to clone any application. I need to do the same in order to test multiplayer with steam in my game [2 clients, for different accounts per each]. [Thought: we need to invent a more seriously sounding, more intelligent word than a "game" to name computer games [yes, they are not "video" games, video games ceased to exist more than 40 years ago, they are "computer games"]. When I write "my game" I feel myself a 12 years old who posts his 2d platformers on itch. "Games" evolved far from this and need a more serious name for legal and academic recognition as art ]If not possible with steam, how to test it on 1 pc? Will a virtual machine be able to handle a windows + steam + a 3d game? I have 32 gb of ram.