AFAIK not. Most popular OS-es start the processor in Real mode. That is, single process, no memory management etc. For what you want, you need to activate multiple virtual machines in the processor.
The concept of virtual machines is used in products like VMWare etc. But those VM's can only be created if you have something to create it. As long as you don't have that 'something' you cannot create multiple machines.
The closest solution to your specification would be to create a Linux installation which is as light as possible, and then start up a number of virtual machines.
But it will be always 'on top of' one running system.