Using Luban and the Dual Extruder,can you set it up so you supports print in one color?

Is there an easy way to set up your project so only the supports will print in one color while your model prints in another?

Any Slicer should be able to do this - in the support section of the print settings you should be able to select the extruder that prints the support.

And yes, luban is able to be setup like this.