If you check out the PNG news board on this site then you will see a thread about Anne Kajir winning Goldman Environmental prize might be on second or third page by now. Her work is based on conserving whats left of pngs rainforests and to encourage sustainability as well as landowner rights.
Since she comes from a law background then her work (NGO she set up) would be relevant to you.
People have also provided links. Think the post courier did an article about her work as well.