You can report him here, but I doubt anything will come of it.
http://wdprs.internic.net/ Even in the event ICAAN took action, eventually the domain would just drop, it would not be awarded to the person who reported it.
I've seen so many solo models have issues with their program or manager and just create a new site with a variation of their name or prefix adjective, I would go that route rather than wasting a bunch of effort on the domain. Unless of course the model is willing to make a deal where she forgives the money owed to her in lieu of transferring the domain to her.
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Its crazy..."
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