Lawyers raised the concerns as they submitted material ahead of Russell Field's trial, set to begin in less than two weeks.

Field has been charged with two counts of murder over the shooting deaths of Richard ''Rebel Rick'' Roberts and Gregory Carrigan on March 24 last year. Mr Roberts was the sergeant-at-arms of the southern Canberra chapter of the Rebels bike gang.

Field has pleaded not guilty to the charges.

Defence lawyer John Purnell, SC, said witnesses had raised concerns with him and his instructing counsel about their safety.

''Some of the civilian witnesses ... have expressed they are in fear of their lives if their names are published,'' he told the ACT Supreme Court.

Statements from some of the estimated 32 witnesses to be called were handed to Chief Justice Terence Higgins as part of a large bundle of agreed material submitted ahead of the trial.

Chief Justice Higgins ordered the material not be made public until both sets of lawyers had time to draft a list of witnesses with concerns.

Representatives from the Supreme Court, Office of the Director of Public Prosecutions, defence lawyers and ACT Policing have been in discussions over security arrangements for the trial.

It is expected large-scale security will be in place for the trial.

Field, 22, has been in solitary confinement for nearly 18 months to protect him from other inmates. He has appeared in court only twice since he was charged.