Yes, I was able to demonstrate two SambaPOS sessions running concurrently on the same computer, using the same database, and displaying on different monitors by following @Jesse directions in the earlier posts.
But the system I decided to use has two separate computers each running SambaPOS, but linked in the standard way to the server database. My intention with two computers is to have an emergency back-up available in case the main server breaks. I use the Database Tools and Dropbox to save the database and mirror to the backup computer at the close of each work session. How to use Database Tools Module