A federal judge in Manhattan has thrown out a lawsuit filed against Paul, Weiss, Rifkind, Wharton & Garrison by the onetime private banker to former WorldCom Inc. Chief Executive Officer Bernard Ebbers.

David H. Trautenberg, the former co-head of Citigroup’s private wealth management group, sued Paul Weiss in December for breach of fiduciary duty, claiming the law firm used against him in severance negotiations confidences it gained while jointly representing him and Citigroup in WorldCom-related matters.