I would like to know if i could have a server hosting the program and having users login into it. Would i need multiple licenses

Would the serve need special requirements or a different license then one you buy for a system?

I know it's not really recommended but my users would only be doing small designs nothing extra vagant

at the moment a 5 year old laptop is doing the work just fine granted render times are 5-10min but you can't ask much out of a core 2 duo.