There is, perhaps, no actor at the moment more synonymous with New York indie filmmaking than Keith Poulson. His uncanny comedic sensibilities first caught my attention in “Somebody Up There Likes Me.” He’s since honed his mastery of the low key “throw away” in dozens of low budget gems and appeared in nearly everything made recently by Alex Ross Perry and Nathan Silver. We talk about the world of independent film acting in New York City, why he can’t do sit-coms, and the beauty of Ctrl-F.