Multisite: Membership and Support System Plugin working on just one site

Hi, i have installed support system plugin and membership plugin to my multisite installation. I currently have two sites created within my network. Site1 and Site2. I would like the membership plugin and support plugin to only work on the Site2 only and not follow onto any -new- sites created on the network.

What I'm wanting to achieve is one central site for my clients if they have any issues with their site and require support, they can visit Site2 and obtain support from the various pages located on site2, is this possible?