The long black coffee in Australia is known in America as an Americano.
An Americano or long black coffee is A shot of espresso mixed with hot water.
So if you want a long black coffee in America you should ask the barista for an Americano.
Some other types of coffee or espresso known by different names are.
A shot of espresso topped with milk froth which is a Macchiato and A cup of hot milk with a shot of expresso poured in is also known in America as a Macchiato.