How do I localize a background image on the global dashboard to only be on my machine?

I was experimenting with the standard, built-in dashboard for Foglight and uploaded a background image to use on my standard interface dashboard.  This worked fine but found this was a GLOBAL setting for the entire user base and not just my machine.

Is there a way to localize this background image to only show on MY machine and no one elses but use the standard, out of the box dashboard?  If so, how?

 

Thank you!