The 21-year-old spent last season on loan at Everton and manager Roberto Martinez is reportedly keen to sign the Belgian on a permanent transfer.
However, Wolfsburg are said to be interested in the player, while Toffees teammate Joel Robles claimed this week that the forward would fit in perfectly at Atletico Madrid.
Lukaku told reporters while on World Cup duty: "I'm not thinking about myself at the moment.
"I'm only thinking about Belgium. We have waited 12 years to be at a World Cup and I am only thinking about representing the team in the best manner possible.
"If we all do well, then it will be a benefit to all of us [in terms of possible transfers], but at the moment I am not thinking about my future. Not until after the World Cup."
The Antwerp-born striker is expected to be in action for the Red Devils against Tunisia on Tuesday in Belo Horizonte.