Have you ever heard of "universal conscription"? Ukraine has that. That means that almost every male of age is a trained soldier in reserve. Of those, quite a few are going to be trained special forces in reserve.
We also know that these local police and army units have defected to their side when the conflict started. Western media likes to call those "occupation of buildings" when in reality it's more of a police and army defecting to the protesters' side and using their resources to arm the reservists among the protesters.
That's why they have such an amalgam of gear in most cases. They just grab whatever gear and uniform is available, and that's often a mix of various camo patterns for different seasons and from different branches of forces. Before the defections, they had an even greater of a mix, there are images of people wearing things like surplus German army jackets and similar stuff. But having 10 men in same gear is nothing out of the ordinary. Most barracks and police stations would likely have much more of the same kind of gear in storage.
I'm sorry, but you'll have to look elsewhere for the "smoking gun" that these are Russian forces. This ain't it even by a long shot.