da documentação de informações do emacs:
You can run multiple Emacs servers on the same machine by giving
each one a unique "server name", using the variable 'server-name'. For
example, 'M-x set-variable <RET> server-name <RET> foo <RET>' sets the
server name to 'foo'. The 'emacsclient' program can specify a server by
name, using the '-s' option.
Isso ajuda?