[Question] Sub Factions

Is it possible to create sub factions that can be cross main factional as diplomacy modifiers?  Such as racials like you are a race of Men +2 you are not Men -2 You are Troggs -4 and what not.  Basic traditional racial discrimination besides the factional discrimination that is normal and even brought up man times within the game.  This amount could be negated by a racial trait such as like betrayers but instead be called accepting or somesuch.  I just think it might add more to the Diplomacy system than what currently is in place.