Somehow, I doubt this will help with things like serpentine creatures that wear pants, though, which is a more complex problem of not having a way to define clothing to only fit certain types of body parts.
I also came across elven bandits living in the sewers of a naga city wearing tail warmers, so this won't help modding in any cases but those that just add multiple "standard" limbs onto creatures.
If, for example, you have a four-armed crab creature with a pair of claw-hands and opposable thumb hands, as well as multiple legs, you still aren't able to define things for clothing except by the GRASP and STANCE tokens, and if you give claw-hands GRASP, you wind up with gloves on your claws.
EDIT:
Also, consider a creature with multiple pairs of arms, with one set of arms several times larger than the others - a pair of gloves made by this creature's race will fit all their hands in exactly the same way.
Consider also that some mods create castes with wildly different creature types and sizes. One mod I saw recently had a female that was several times the size of the male version of the race, and they both wear the same sized clothing.
Then there's the way that some mods have wildly different castes, like that one mod I made where a spider-person with 8 legs and 2 arms was the same species as a serpent person with a tail with STANCE, which was the same species as a minotaur that was several times larger, all living in the same civ.
That elf wearing tail barding and tail warmers? Considering how large a relsize the tail is for those nagas, that tail warmer would cover 2/3s the body of an elf, and the elf was wearing two of them like socks on his feet.
Clothing currently just doesn't respect relsize very well, and it's going to take a much more complex system to handle all the things modders want to do.