That's hard to tell. Some can, some can't.
There are remote villages—you read about them in Rory Stewart’s book. There are people there who have never ventured outside of their village. And strangers almost never venture in. To them, in those areas, a stranger is a stranger.
So some of them can't tell. But the people running things, the people in the government, the educated people in Kabul, the thousands who've come back to the country, they understand the difference and they recognize it.