Australia's broadcast media watchdog has dismissed complains that an ABC Four Corners report about WikiLeaks publisher Julian Assange was inaccurate and biased.

A lengthy investigation by the Australian Communications and Media Authority has found that the Four Corners program Sex, Lies, and Julian Assange, broadcast in July 2012, did not breach the ABC's Code of Practice.

The ABC report by veteran investigative journalist Andrew Fowler examined allegations of sexual assault and rape made by two Swedish women against Mr Assange in August 2010 and subsequent criminal investigations and extradition proceedings by Swedish prosecutors.

The program also discussed the possibility that Mr Assange could be extradited to the US to face charges related to the leaking of thousands of classified US diplomatic and military documents by US Army private Chelsea Manning, formerly known as Bradley Manning.

Two complainants asserted that Four Corners presented inaccurate information, omitted relevant information and was biased in favour of Mr Assange.