Zeno was Philodemus' teacher.
Yes, we have in Signs (P. Herc. 1065) Philodemus says "Zeno, in his discussions with us, used to set forth the arguments of our opponents, and he made use of the answers that have been given."
Interestingly Philodemus does concede familiarity of Zeno to a certain fellow-Epicurean named Bromius. Philodemus starts the second section of Signs saying "Bromius, however, used to say that Zeno expounded the beliefs of our opponents and the answers to them in the following way..."