Step-by-step explanation:
In a case where the Immunomedics' complaints may rise to the level of an actionable legal claim, a court order could be issued by the court requesting the ISP (Internet Service Provider) to provide the identity information of the poster in order to file suite the individual.
However, where Immunomedics' complaints does not rise to the level of an actionable legal claim, that is the facts are not enough to prove the case, then no lawsuit can be filed.