I realize this is several years on, but my work flow is creating designs for laser cutting.
Currently, there's no postProcessor that I know of that does laser cutting.
My work flow is to create two Sketches 1 for cut lines and 1 for etch lines (could be more for different etch parameters). LightBurn and several other laser utilities will treat DXF layers as differentiated for cut parameter purposes (a la Epilog's print driver "Color Mapping").
Ideally, I'd like to do this under API control (I've got an API script which takes in a set of userParameter values, creates a new component under the root component, then creates two new sketches on the XY Plane within that component (one for cut, one for etch).
If I use the cloud processor, I am able to select both sketches and Export to DXF and get the desired result. Locally, I only seem to be able to save 1 sketch to 1 DXF, and there's no way to mark lines to go on different DXF layers that I've been able to find.