You Do Need power plug adapter while traveling from Papua New Guinea to Lebanon.

Here is Why You Need An Adapter

The outlet and plug type used in Lebanon are C, D and G and in Papua New Guinea is I. This is how they look like.

Papua New Guinea

In Papua New Guinea, outlets of type I are in use.

Type I

Lebanon

In Lebanon, outlets of type C, D and G are in use.

Type C

Type D

Type G