Yes, you can setup a private quarantine for your users so that they can review spam that was sent to their address (or set of addresses). The quarantine user logins are limited to the Quarantine and the Dashboard. You can also setup a single quarantine for a group of users to share (sales@, jim@, mary@, bob@). In this case, the group of users will share the same password and 2 factor authentication code (if 2 factor authentication is enabled).
Users can also have Quarantine Reports sent to them on an hourly, daily or weekly basis so that they can review and release quarantined messages directly from their own email software.