If I have a big environment with 100,000 users, I am planning to split the servers for WFE, Application Servers and Batch Processing.
I wonder if there is an specific way to enable/install specific timer jobs only in one server or group of servers
You could do it from the TimerJob definitions by specifying the SPServer and the SPJobLockType. MSDN
Though this would be easier if your solution was not already in production