[SOLVED]How to set limit access for an admin user?

Hello,

I’m using OC 4.0.2.3.
How can store owner to set allow limit access to module installation only for a module author , and restrict him to access any other admin pages?

Please advise. Thanks in advance!

The purpose for this is letting the module developer to install and edit/setup for me per request. Actually this is a very easy steps. BUT Not sure why the module successfully installed from Installer, but click on Edit (try to enable it) in Extension list page, it always turn to blank page.

I tried to set up the permission for an author to install and Edit the module from User group. But the Extension list selection page never show up. How can I set up the Permissions from the User Group?

Need help. Thanks in advance!