Same as MWR I can unlock all camo (1 kill instead of 200, 1 headshot instead of 160.. etc etc) but i'm not really motivated to do it actually, maybe later but not now.
if you're good with cheat engine, you can check around this offset : 145BC90A9 -- updated address -- (Volk weapon challenge start here)
how it should look like to unlock all Volk camo until Gold :
do it for each weapons to unlock Diamond etc etc.. btw its only multiplayer camo, not others you can get with drop
good luck for finding others weapons or wait until me or someone give you offset for others weapons. Enjoy]