Resize image after upload plugin create submenu item “Settings->Resize Image Upload” for every subsite and protect it using ‘manage_options’ capability. In order to block/hide menu item for subsite you have 2 ways:
1) Block it for the main site. Then replicate all roles with admin menu settings together for all other subsites. Go to the “Network Admin->Users->User Role Editor” and click “Update Network”. Pay attention that this operation overrides all roles at all subsites with a copy from the main site.
2) Go to the selected subsite, open URE, select role with ‘manage_options’ capability. “Resize image upload” is available only for such roles. Then block this menu item as you made it at the main site.
