I wrote this a while ago and it seems to work ok, I was kinda hoping someone had a better solution though.

import poser

scene=poser.Scene()

for act in scene.Actors():
    if act !=None:
        if (not act.IsBase()) and (not act.IsDeformer()) and (not act.IsZone()) and (not act.IsLight()) and (not act.IsCamera()) and (not act.IsBodyPart()):
            try:
                if act.Parent().InternalName().lower()[0:4]=='head':
                    print 'probably hair', act.Name(),'n'
                if act.ConformTarget().lower()[0:4]=='head':
                    print 'probably hair', act.Name(), 'n'    
            except:
                pass

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