When I create a sketch and use project toolpath, I have no option to have the cutter cut inside or outside the sketch - I can only cut directly on the sketch, the cutter directly centered on the path.
I know a rough workaround would be to make an offset sketch in the model workspace, but it can prove to be a pain when dealing with complicated sketches.
This feature doesn't sound like it would be too hard to implement since having an offset from a boundary seems pretty common amongst other toolpaths... why, Project will even allow offsets on the Z axis.
Here's an image illustrating the current dilemma. As shown, the cutter can only be set to be centered over the sketch line.:
