Doesn't mean much when Air Palm and Rotation too can be used without Byakugan, plus Susano'O at that with Sharingan. Dojutsu techs don't necessarily need the eye used directly to implement.
I don't know what dojutsu refers to (could be Byakugan, RinneSharingan, or both), but assuming that refers to Byakugan alone, that could mean nothing more than using it as a scope to aim at weak points the same way Neji did when using Air Palm.
Anyways, given the naming style, the method in which the attack is performed, it being listed as Taijutsu KKM same way Rotation or Air Palm is a Taijutsu KKG, and the simple fact that a CLEAR comparison was made between Vacuum Attack and Air Palm with the only difference being noted is the POWER level, it's safe to say it's clearly a Byakugan ability.