Interesting story. Despot and occasional pal of Dennis Rodman, Kim Jong-Un, held Korean War veteran Merrill Newman for, well, war crimes before releasing him. Should Newman be eligible for a prisoner of war medal? Technically speaking, he is not entitled as he is not a current member of the US Armed Forces, AS FAR AS I KNOW. Yet the actions emanated from his involvement in the war itself. Finally, we are still TECHNICALLY AT WAR with N. Korea.
Note that contractors are not eligible for awards when they were taken in Iraq or Afghanistan, so there is precedence for civilians being taken prisoner in active war zones, including being a civilian in a country where one was formerly serving as a member of the armed forces. In this sense, Newman is not a prisoner of war. But it is an interesting question nonetheless...