Can Texis restrict groups of people from seeing certain docs?

Yes. This capability is very flexible. Entitlements may be set document-by-document, or by groups of documents. Unauthorized users will not see restricted documents in search results and will not be able to retrieve them any other way. Texis recognizes users by login or cookie, and it provides a mechanism for carrying a user's identity from page to page in an encrypted URL, so that entitlements may be taken into account on every page visited.