Victoria Police has moved block criminals whose convictions are under question from the Lawyer X inquiry, as well as their lawyers, who said the attempt was “Kafkaesque”.

Gangland murderers once represented by barrister turned police informer Nicola Gobbo are pushing to be freed. But on Wednesday, police lawyers told the royal commission into the use of police informers that the criminals' lawyers should be locked out of the hearing.

Former Purana taskforce detectives who investigated the cases of underworld gunmen Evangelos "Ange" Goussis and Faruk Orman are set to give evidence, but Victoria Police wants to control the information the jailbirds' lawyers are allowed to hear.

Gangland killer Evangelos Goussis.

Instead, police lawyer Renee Enbom said the killers should be given transcripts of the evidence after the force had reviewed and redacted the material.