Where did you see a lı in the sentence?
Outside of the word İranlılar "Iranians", of course.
Also, "(together) with" is ile or -le or -la -- -lı -li -lu -lü is "made of" or "coming from" or "made with", not for doing something with someone else. Like how an İranlı (an Iranian) is someone who "comes from" Iran. It doesn't mean "with Iran".