So could I create a set of reports, each on its own tab, and require distinct sign-ins for access to each tab. I'm not sure that's clear. Let me add a little context. I'm a teacher who wants to use my own Excel grade-book. I've seen it done in a very creative way, with a tab for the data and a reporting tab that generates a report according to the student's name. However, it's illegal to share all of that information publicly, so I'd like to limit a user's access to viewing a specific student's data/report. Feasible or unfeasible, that's my question.