Via TMZ   For the second time in a month, Lil Wayne and his entourage are under investigation for assault ... and once again the alleged victim caught a beatdown for daring to take a photo of Weezy.   Alfredo Marino tells TMZ on May 3 he spotted Lil Wayne and his posse skateboarding. Marino says he is a HUGE fan of Wayne's so he went up to Weezy to ask for a photo -- but was shut down.   Marin…