Oh, that is just nonsense. Helmand province in Afghanistan is not a place where troops of any coalition country can go out and party with locals like idiots. It's considered the most dangerous part of the country, utterly riddled with insurgents and Harry was actually pulled out of one tour precisely because they'd found out he was even THERE.
BBC NEWS | UK | Harry withdrawn from Afghanistan
Part of the controversy with Harry's service was that by being in Helmand, he could be seen to be endangering the other troops above and beyond the already very high risks because he was such a target as a high ranking member of a coalition royal family. It would have been a score above scores if Taliban or any of the other insurgents could have kidnapped/ransomed or murdered him. The British government has a policy of never paying ransoms, but if H had been ransomed they would have been placed in a very bad position with that. For sure, Helmand is not a place like say, Okinawa, where there's a whole econony based around foreign troops and catering to their party needs ( which with soldiers boil down to booze and easy women). Both things are somewhat in short supply in Afghanistan. Super strict Muslim country, women barely are seen in public at all. Even in Kabul, as a foreign worker you leave the safety of your compound and the big thick blast wall at your own risk.
If that blind has any truth to it, it's another member of one of the many royal families out there, and certainly could not pertain to H in Afghanistan.