Elisabeth Subrin is a New York-based filmmaker with local roots — she grew up around here, went to Newton North High School, studied film at the Massachusetts College of Art, taught at Harvard, and her parents reside in Cambridge. Her new film, “A Woman, A Part’’ will make its North American premiere at the Brooklyn Academy of Music next month, as part of BAM­cinemaFest. The film stars Maggie Siff, best known for her roles in “Mad Men’’ and “Sons of Anarchy,’’ as a 40-something TV actress seeking to escape her on-screen persona. Subrin told us that planning is underway to have the film screen elsewhere (including Boston!), so stay tuned.