Ioane suffered the injury in the 21st minute of the match with the scores tied at 7-7 and was taken from the pitch, but was able to return nine minutes later and see out the match.
However, on Sunday it was confirmed that the 20-year-old would miss some time.
UPDATE: @rieko_ioane dislocated his finger in last night's #AUSvNZL Test. Steve Hansen says he'll be out for two weeks.
The injury will see Ioane miss the All Blacks' clash against the Barbarians in London on November 5 (NZ time), with the touring squad set to be named on Monday.