Unless there is something particularly strange about the copyright situation in Iran, we should generally respect Iranian copyright law as best we can, the same as we do for other countries around the world.
The situation with respect to treaties or non-treaties with the US seems to me to have very little impact on this. As always, we have to balance various factors in thoughtful ways. Simply saying "Well, this is legal under US law, so let's do it" is not a very compelling argument.
A similar situation exists with "fair use". Fair use doctrine is significantly better in the US than in other jurisdictions, which is a fine thing, but German Wikipedia, for example, follows more restrictive German law on this point. Why? Because part of our goal is re-use in Germany.
--Jimbo