according to Magento http://merch.docs.magento.com/ee/user_guide/store-operations/permissions.html
In addition, you can further restrict Admin access to only a specific site, or set of sites and their associated data. If you have multiple brands or business units with separate stores on the same Magento installation, you can provide Admin access to each of your business units but hide and protect their data from other Admin users. If an Admin user’s access is restricted to a specific set of websites and/or stores, the websites and stores for which they are not authorized will either not appear or be grayed-out as inactive. Only the sales and other data for allowed websites and stores is shown.
I cannot figure out how to restrict an admin login to a specific storeview - has anyone done this?