Holdup has it been canon that Porrim's been with everyone? I could've sword she was only with Aranea?

It’s not directly stated, but it’s kind of implied. 

 Porrim refers to trolls passing “thro+ugh the well-greased revo+lving do+o+rs” to her quadrants, 

and Kankri refers to her “innumera6le flushed 9r caligin9us flings”.