The subpoenas are the result of a litigation campaign by US Copyright Group, a Washington-based venture launched by the intellectual property law boutique, Dunlap, Grubb & Weaver, with offices in Washington, and Vienna and Leesburg, Va.

The campaign is targeting users of the BitTorrent file-sharing application. In a June 2 update on the law firm’s website, the firm noted that more than 50,000 individuals have been sued so far in connection with the downloading of 10 films, including “Call of the Wild 3D” and “Far Cry.” Name partner Thomas Dunlap says in that update that Voltage Pictures, producers of the Academy Award-winning “Hurt Locker,” recently signed on to the campaign and he is preparing a lawsuit on its behalf.