proprietorial

adj

1. Of or pertaining to ownership.
2. Characteristic of or behaving like a proprietor or owner (of a thing); possessive.

   “A superficially handsome young fellow had his arm round her, and he barred my way and told me something in proprietorial Flemish.”

   ““I'm pretty sure he did, Felix.” There was a proprietorial note in Rose's voice, to which I objected.”