|Gerard Peter Scully (right)|
A complaint, filed by Justice Department investigators with the prosecutors' office, said Scully forced the girls to perform sexual acts in front of a video camera for paying clients overseas.
"Let notice be served to these criminal elements that the days of their child cybersex operations are numbered," Justice Secretary Leila de Lima said in a statement on the case. "Wherever these syndicates are, we will hunt them down and we will bring them to justice."
In the complaint outlining the case against Scully, a 13-year-old girl was quoted as saying that her impoverished family agreed she could do domestic work at his home in 2012. But she was instead forced to perform sex acts with other girls, and was beaten by Scully's Filipina girlfriend when she refused, according to the prosecutors' complaint.
"They told me they had to take pictures of me naked because there was an American who really wanted to see me naked... and because the American will pay a large amount," the complaint quoted her as saying.
The girl said she fled Scully's house after she learned he had sold her to a German national who was coming to collect her, the complaint said.
If convicted, the Australian could face life in prison.
Authorities have warned the Philippines is a major hub of a billion-dollar global child cybersex industry, with operators aided by widespread poverty and legal loopholes that allow them to remain anonymous.
Last year, de Lima said that online child abuse was the leading cyber-related crime in the Philippines, making up 46 percent of the more than 200 cases being handled by law-enforcement agencies.