Collingwood moved Lokan to a half-back flank and he made his senior AFL debut in round 1, 2003, playing all matches that season, including the Grand Final against Brisbane.

In total, Lokan played 46 matches in three seasons, averaging 7.8 disposals per game.

In 2006 Lokan returned to play for the Port Adelaide Magpies, his original club.

In 2012, he became the playing coach of the Belconnen Magpies in the North East Australian Football League (NEAFL).

On 13 November 2017, it was announced that Lokan would return to Port Adelaide as the head coach of the Magpies' SANFL senior squad.