Hmm. For now there are few global forces defined for the entire domain like drag, turbulance, wind, wavelet noise, etc. which are based on procedural noises (mostly curl and perlin) and user can modify its parameters to his liking.
Later I thought about adding discrete forces attached to a point so the user can move them for some more creative control.
But overall I want to make this solver node based so finally the user will be able to define his own forces.
Hope it explained your question 