Thats also simple, you can store the time limit for each player using a client string. To set this client string simple do:
PHP Code:
client.timelimit=32;
Yep! it's as simple as that although you will want to use a clientr string so players can't use a memory scanner to manipulate it, clientr strings can only be set serverside but read both client and server side so you should keep that in mind.
Also i'm going to assume your relatively new to scripting in general so just so there's no confusion client and clientr are reserved words but the name isn't fixed and can be whatever you like.