I didn't go there but my company evaluated a potential investment there 3-4 years ago. The summary about the situation in Port Moresby is that it is very dangerous as far as crime goes. There's a general view that law and order does not exist in any basic form in the capital city (provincial cities are o.k.) due to maruading gangs and a police force not willing or able to impose order. It's long been said that one should not go out of a guarded compound after dark.