I remember seeing this decades ago and thought it looked as though it was a multiple filter exposure using red, green and blue in combination with the triple exposure.

This is normally done using colour film with the idea to make things that move look different and the things that don't move to look normal. I remember how some of the prints I saw and the small amount a couple of us did as an experiment in a studio turned out, the look isn't that much different.

I pretty much assumed a long exposure, and the hair being moved by a man made zephyr.

Mick.