I think your muddying the waters by introducing Francs-tireurs into the mix - I am sure this document is about state actors resistance groups are a trickier proposition eg USA politicians effectively turning a blind eye to PIRA fund raising.
Some research finds that under current laws of war “Combatant and prisoner of war status is granted to members of dissident forces when under the command of a central authority. Such combatants cannot conceal their allegiance; they must be recognizable as combatants while preparing for or during an attack."
So it looks like the self organizing nationalists as some of the Russian a Chinese hactivists have been described that attack enemies of the sate are not covered.
The document is about its contents and its contents alone, irregardless of what we may be sure it is about.
I disagree that including the French Resistance as an analogy for the types of groups that could come under the provisions of this manual is muddying the waters. They strike me as a salient example of non-military, non-governmental personnel who could be (and were historically) categorized as combatants if engaged in cyber activities during armed conflicts.
The manual specifically includes civilian actors engaged in cyber actions during wartime hostilities between countries. It does not, to the extent I've read it so far, include a distinction between those who are resistance groups and those who are state actors--that's a subjective determination and what this doc is discussing is applying the Geneva Conventions to contemporary issues.
[Nitpick:] More confusing still, using Francs-tireurs is, unfortunately, both too specific and ambiguous at the same time. Some (like myself) might mistake you for meaning the Francs-tireurs from the Franco-Prussian War, where the term originated. Or did you mean Francs-tireurs, the name adopted by a couple groups who were part of the Resistance (like the FTP). Then again, that francs-tireurs became a more generalized term to refer to potentially non-lawful combatants between and after all the wars from the Franco-Prussian to WWII, adds further chance for confusion. Assuming you are referring to the French Resistance as I was, however, it is not the general term used for the Resistance members as a whole.
Given the quote you include, it then sounds like you're not responding to the Resistance at all, but perhaps the generalized francs-tireurs--note, no capital F--about whom those rules were made during the Third Geneva Convention.
Some research finds that under current laws of war “Combatant and prisoner of war status is granted to members of dissident forces when under the command of a central authority. Such combatants cannot conceal their allegiance; they must be recognizable as combatants while preparing for or during an attack."
So it looks like the self organizing nationalists as some of the Russian a Chinese hactivists have been described that attack enemies of the sate are not covered.