I have talked with some older friends and they have confirmed it.
In I fact I remember in four years of hunting license I met only two times abroad hunters(One group from England and one group from Netherlands).
I am searching info about the paperwork for foreign hunters and I have discovered it's more easier and cheaper for Austrian and German hunters because there's an agreement by Austria and Germany with the special province of Bozen, it makes possible have paperwork in few time and few money.