Hird is also hoping to stop the charges being heard until he has been given "proper particulars" of the charges against him and a list of the witnesses the AFL plans to call and the evidence they will give.
The 1996 Brownlow medallist wants the AFL to deliver the particulars by September 16 and the witness list by September 30.
He is also seeking damages for "interference with contractual relations" and court costs.
The Bombers coach, the club and three other officials have been charged by the AFL with bringing the league into disrepute over Essendon's supplements scandal.
Hird's lawyers lodged the writ with the Victorian Supreme Court on Thursday morning.
Hird told a media conference on Wednesday he'd been denied natural justice by the AFL.
On Wednesday, eight days after the AFL announced it had laid charges against Essendon and the four individuals, Demetriou went ahead with the league's intention to release the details in a 34-page document described by AFLPA chief Matt Finnis as shocking and distressing.
Hird is demanding the case should be heard by an independent tribunal, not the AFL Commission.
In addition to stopping Demetriou sitting on the hearing panel, Hird wants any AFL commissioner banned who has read the interim report prepared by ASADA into the allegations.