FOR years, Massoud Dehnamaki was known widely as the feared enforcer of conservative rules that restricted freedom for women and society. In recent years, however, he has emerged as Iran's Michael Moore, having directed a documentary on the taboo issue of prostitution and another forthcoming film on soccer as a metaphor of political struggle. Reformists and conservatives alike harshly criticized Mr. Dehnamaki for making the first movie, "Poverty and Prostitution." Conservatives were furious that one of their own had not only highlighted an un-Islamic social pathology but seemed to sympathize with the prostitutes. Reformists believed he deliberately exaggerated the problem...