It’s easy to do by breaking your path up and color coding them to be used independently, as well.
If you tell us what software you use, someone can give specific-ish instructions.
If you share the art you’re trying to use, we can get very specific.
Also there are guides to using the passthrough if you dig through the forum. It’s a bit of a hack process ,because glowforge hasn’t released any true passthrough software yet.
Jules herself (see above) did at least one writeup, check it…