Globally Hide Modules/Features


Kindly be informed that I am firs trying to discover discover ERPnext so I have installed the open source code of ERPnext v14 into a ubuntu server, my question is:

Using ERPnext v14… I am trying to customize the hole ERPnext desk to work for multiple instances (or multiple sites) while each site I can give it a specific modules and hide/disable the others.

How can I globally hide some modules from the site administrator user.