Yes I am from PNG. Based in Port Moresby and I SUP every day. Unfortunately I am about the only one but we are expecting Piros and his crew soon.
We have very seasonal surf conditions here. Port Moresby where I am is on the South coast and our surf season runs from April-November-ish. On the North coast and the New Guinea Islands its more or less the opposite. But they get much better waves up there.
I have been doing lots of downwinders and inter-island paddling. Last weekend it was glassy calm and I did a 15 mile paddle to Daugo (Fishermans) Island which is a first for solo paddle craft as far as I know. This morning we had a big session out at Taurama beach with the surf club. Got a few waves but it was very windy so I swapped to my shortboard halfway through.
Where are you going to be and what sort of board are you thinking of bringing? There are lots of nice spots to paddle and you can do some good fishing or snorkling off your SUP too.
Feel free to ask any specific questions