Whether he was thrown out or chose to go on his own is unclear. Clarification has been siought from Debian leader Mehdi Dogguy.

Appelbaum left the Tor project, a system enabling anonymous online communication, on 2 June after charges of sexual misconduct were raised against him.

He has been asked to leave hacker groups Cult of the Dead Cow, Noisebridge, and will not be allowed to attend events organised by the hacker group Chaos Computer Club.

Appelbaum was one of the keynote speakers at the LCA in Ballarat in 2012.

In an email sent to the Linux Australia mailing list, Russell wrote: "Due to his long history of sexually abusing many people Jacob is no longer involved with Tor, Cult of the Dead Cow, Noisebridge, Chaos Computer Club, and Debian.

"I think he should not be allowed to attend LCA in future.

"Also I think that as he was an LCA keynote speaker and has a history of sexually abusing other delegates at computer conferences (in a gross violation of every CoC) I think that Linux Australia should make a public statement about this.

"Jacob has a history of using positions of influence and respect to exploit people, we don't want his history as an LCA keynote speaker to be used for that."

Responding to his email, Linux Australia president Hugh Blemings wrote: "Thank you Russell for flagging this. It is on our agenda for the regularly scheduled council meeting tomorrow (21 June) evening, I'll defer further commentary until after same."

Since Appelbaum left the Tor Project, a number of people have come forward to accuse him of sexual misconduct.