I made a packaging design for a rectangular box and I'm trying to figure out how to indicate when a line is not simply FOLDED (as indicated with a dotted line) but CUT as a dotted line.
Standard procedure in the packaging industry is to have a separate spot colour (and sometimes a separate layer too) for creases and cuts. So if you follow this rule, create a creases spot colour and a cuts spot colour and then a crease would be dashed line coloured as crease and the perforation would be dashed line coloured as cut. If necessary, you could have a third colour and separate layer for dimensions and notes.
However, this may all be besides the point because the usual process would be for the printer or finisher to provide a cutter guide and maybe even some samples based on your design brief. You should only be doing it if it's just for a mockup or an academic exercise.