Qatar Airways allows you to carry alcoholic beverages, when packed in receptacles of less than 5L, in hand baggage or checked-in baggage. Your beverages will not be confiscated, while customers are in transit at Doha International Airport.
This does not apply if you are travelling to Melbourne. Customers who purchase alcoholic beverages or cosmetics in an airport other then Doha International Airport, will have their beverages confiscated by ground staff at the departure gate. This is in accordance with local Australian regulation.
If you intend to enter the State of Qatar, please be informed that alcoholic beverages are not allowed to be imported under any circumstances.