The 20-year-old talent has made just four league starts since signing for the Hoops last season and hasn't been seen in a Celtic shirt since starting in the shock Scottish League Cup defeat to Morton last month.
Rogic is highly-rated in his homeland and is challenging for a starting spot with the Socceroos, who were one of the first teams to qualify for Brazil next year, after winning seven caps already.
But they have a new boss in Ange Postecoglou and Vidmar - who is now manager of Australia's youth teams - reckons Rogic is in danger of missing out unless Neil Lennon starts playing him.
Vidmar said: "He hasn't had much game time and it'd be frustrating for him.
"It's up to Ange to see if he's going to throw him in there.
"Do you need to be playing regularly for your club as a prerequisite or is Ange going to go with the best players irrespective of game time?
"When you're an established player you've got a good chance of getting into the first team, but Tom's at an age where he's still developing.
"Is it the right environment where he can develop? I don't know. We'll know in the next few years.''