The judges have also ordered Cayley to retract portions of a public statement involving Case 003.
The procession included monks from Burma, Japan and Thailand, as well as Cambodia.
Sam Rainsy alleges Hun Sen was responsible for the deaths of people sent to clear forests along the Thai border in the 1980s.
About 250,000 women were forced to marry against their wills by the Khmer Rouge, according to the film producers.
“Extraordinary Chambers” is showing at the Geffen Playhouse in Los Angeles through July 3.
The 57-year-old woman, Mom Kim Sein, said she was kept by the Khmer Rouge at S-24, where prisoners were tortured.
Cayley issued a public statement claiming judges Siegfried Blunk and You Bunleang should do more investigation into case 003.
Unlike Case 002, which saw more than 6,000 victim complainants, cases 003 and 004 so far only have 318.
Among those problems is that of forced deportation, a US policy that sends non-legal immigrants back to their presumed home countries.
Tribunal spokesman Lars Olsen said the Pre-Trial Chamber was under no time limit to consider Cayley’s appeal.
For Nou Leakhena, however, the court is just one way to heal what she says is widespread post-traumatic stress from the regime.
Khmer Rouge victims and tribunal monitors have expressed concern over the amount of participation allowed to so-called civil parties.