Moodle Multi-tenant functionality

I have a Moodle 2.2 install and need the following multi-tenant functionality: A generic front page with vanilla branding and text (to be provided), no LMS functions on display to allow users to login to the LMS * Alternate login pages are available and can be branded with a client organisations look and feel and be accessed via a subdomain. * When logged in users are taken to the tenant organisation they belong too * Users and Admin must not be able to see or search any courses or content belonging to another organisation * A super user admin page must exist to create the client accounts and upload any branding (logo/text/contact info) for the client organisations front page. * Client organisations should have the ability to apply their own branding I would welcome bids from anyone with Moodle experience - especially if they have done this before. Full specification will be worked up as part of the interview process and at the start of this project.