I don't understand the question, but will say that once you have a license to use BEYOND, then it will work with any supported hardware (QM2000, FB3, FB4) -- AS LONG AS -- the licensed piece of hardware is available and connected to the same computer.
If you are asking how you would essentially use two separate computers with BEYOND -- yours and theirs, with their hardware on their BEYOND computer, then multiple such computers can be connected and used together using something called "The BEYOND Network". See the menus for more information about this.
However, the more typical scenario is a single BEYOND computer that is connected to all hardware simultaneously.
Best regards,
William Benner