Four films selected from 475 submissions won Tribeca All Access prizes and three more earned honorable mention at a Friday night ceremony at City Winery.The TAA program, run by the Tribeca Film Institute, is in its sixth year. It aims to provide young people from traditionally underrepresented communities a chance to express themselves through film. “Somnium,” directed by Miguel Aviles, took the narrative award and Andrew Bui’s “Bronxopolis” won for emerging narrative. “La muneca fea” (The Ugly Doll), helmed by George Reyes, won for documentary, and Jinho Ferreira’s “Walter’s Boys” took the screenplay prize. The TAA jury included Viola Davis, Sanaa Lathan, Fenton Bailey, Luis Guzman and Ellen Kuras. Along with modest cash awards, winners get help networking with and pitching projects to industry pros.