I went to a presentation on the AW609 at the RAeS and licensing was discussed. As has been said it has the US "powered lift" category applicable to it and I do not believe there is an equivalent EU license.
This is an old article that also relates:-
Osprey Pilots Receive First FAA Powered Lift Ratings - Aug 21, 1997
Although frankly one fails to see where the market is for the machine, even in the presentation the AW609's chief test pilot's best efforts at giving colour on a market is best summed up as "The wealth individual that already has a jet and/or a helicopter and just must have the latest thing...."
Hmmmm...