The main Jamie Madrox doesn't practice law at all, but one of his duplicates, "Matt Rocks", is a full time lawyer who was introduced in one of Jen's previous solo books.
Anne Weying is dead, and was only temporarily She-Venom.
Maki Matsumoto is Lady Bullseye -- she works more as an assassin than as a lawyer.
Sachi Yama isn't a superhuman. She was a lawyer for a superhuman once.
Harold Leland is currently the Krakoan ambassador to the U.N. Until his recent resurrection he's been dead for years, and before that he spent most of his time on the Hellfire Club, so its been a long time since he practiced any law.
Some other significant names in law for the Marvel Universe would be Bernie Rosenthal and Connie Ferrari - both of whom are former love interests of Captain America.
The current Beetle, Janice Lincoln, is a lawyer -- it might be fun to see her and Jen face off against each other in court.
Of course there's Mallory Book from her old firm of GLK&H. And Two-Gun Kid was a lawyer in his own time period.