http://video.google.com/videoplay?docid=-8057768553173785296&q=Singapore+RebelSingapore Rebel by Martyn See, which documented Singapore Democratic Party leader Dr Chee Soon Juan's acts of civil disobedience, was banned from the 2005 Singapore International Film Festival on the same grounds and See is being investigated for possible violations of the Films Act.
On the other hand, Channel NewsAsia's five-part documentary series on Singapore's PAP ministers in 2005 were not considered a party political film. The government response was that the programme was part of current affairs and thus does not contravene the Films Act.
In a hypocritical twist, films that call out political beliefs of other countries - e.g. Michael Moore's Fahrenheit 911 - are allowed.