I'm creating an extranet for customers and on the homepage, there are multiple lists.

I was wondering, when a particular user logs in, is it possible to have different items in lists show and others hidden.

For example, user A logs in. On their homepage the lists have items A, B and C. User B logs in and their lists have items X, Y and Z, but they cannot see A, B or C.

Would I be able to do this, or do I have to create a different site for each user and just make new lists?