Action star Steven Seagal could come Under Siege today after a federal judge yesterday left the door open for two reputed mobsters' lawyers to grill him on his various legal entanglements.

"I'm going to keep some restraints so this does not turn into a media spectacle," Brooklyn federal Judge Frederic Block ruled yesterday. "I'm going to try and keep things cool."

Seagal, who is set to take the witness stand Tuesday, claims his former film producer teamed up with a crew of wiseguys in a $3 million shakedown scheme. Since the start of this case, defense lawyers have branded Seagal a "pathological liar."

"He has the appearance of a history of attacking people or threatening people who he perceives as a threat," said Richard Levitt, lawyer for Primo Cassarino, a reputed wiseguy on trial for extortion with alleged capo Anthony "Sonny" Ciccone.

Block said he would allow cross-examination on a suit Seagal has filed against the "German mafia," thwarting prosecutors' attempts to stop defense lawyers from suggesting that Seagal likes to feign victimization.

But Levitt and Ciccone's lawyer, George Santangelo, will not likely be permitted to grill Seagal on his ties to a private eye in L.A. who has allegedly threatened journalists reporting on the New York case.