Trade negotiators from the United States, the European Union, Japan and other countries are in Wellington to discuss clamping down on copyright infringements.
Internet user groups say there's a potential threat to civil liberties from the Anti-Counterfeiting Trade Agreement (ACTA).
Unlike previous intellectual property and copyright treaties, the ACTA negotiations have taken place behind closed doors.
A spokesperson for Internet New Zealand, Jordan Carter, says that's because the United States government doesn't want public scrutiny of its hardline approach.
Mr Carter says while the music and movie industries claim they're losing billions of dollars because of illegal downloading, evidence suggests they're making more money than ever.
However, the New Zealand director of the Australasian Performing Rights Association, Anthony Healey, says piracy is hurting New Zealand artists and he supports moves to strengthen the law in New Zealand.