There is no limit, and he can represent 1 cases at the same time, as long as he can do it. But a lawyer can only represent one party in the same case. As long as the authorized person makes full authorization, the lawyer can represent him with full authorization, except, of course, criminal cases.
a case is not limited to several lawyers, and one can also be several. According to different procedures and stages, lawyers can be hired or replaced.
after a long answer, I still don't know what you want to ask. What is the specific situation?