"We are moving slowly to arrest the suspects involved in acting as well as producing pornographic movies," the official said, without saying how many people were wanted.
A list of people will be filed in court on Thursday, he said, adding that the bureau had already moved court to ban 180 Sri Lankan porn sites showing locally-made videos.
The Sri Lankan Telecommunications Regulatory Commission (TRC) has been asked to prevent users in the country accessing the websites.
The move followed complaints heard at Colombo's Juvenile Court that children had free access to the websites featuring Sri Lankans.
Other adult sites featuring non-Sri Lankans will remain available, however. Sri Lanka already maintains an unofficial ban on websites of dissidents by getting local Internet