1. Is this possible? (suppose not)
2. Were can I ask for this to be implemented as an enhancement?
I'm not sure I can answer this but first a question. Do you want each workspace to have a different background? This can be accomplished in compiz, wallpaper. Are you talking about mulitple monitors? If this then what graphics are you using? I use ATI/AMD and have two monitors, each with a different background. But it is the same background on each workspace.
You can also use wallpapoz. I originally installed it so that each desktop could have a different background, but ended up having all of them use the same one, but changing at random. You can even have a different random list for each desktop if you want.
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