Is there anyway of increasing the AA filter on particles?

I have this hair that I want to make look not aliased. It’s attached.

Is there a filter option for patricles, like for textures?

If rendering time is not a problem, try turning on both AA=16 and motionblur, this will effectively give you 256 samples.

You can increase the thickness of the static particles via the “Strands” button in the material buttons (F5 key). This will probally give you the result that you’re looking for.