When a module is updated with new or different content, it will be updated everywhere it's being used.
So if you're using this module in multiple programs or groups, it will be updated in all programs and groups. And all group members will see the new content.
If you want to update a module only for some groups, programs, or clients, then create a copy of that module first by using the "Clone" feature. Then revise the content in the copy of the module.