Hi Arshad,
If you want to have specific limits per machine, create a local copy of the template just for that machine. If you have different groups of machines that each need a different template, create one for each of them.
For the local copy - this will only apply on that device.
go to device -> Click on the gear, Click "Create Local Copy".
For a template to apply to a device class.
Go to Advanced -> Monitoring Templates -> search for "Server/windows" under "Device"
Highlight it, in the gear icon, select "override template", select the device class you want to apply a new template too.Then any changes made to this template will only affect hosts in that device class.
Good Luck.
Regards,
Joan