There are a number icons used by SPM to represent the status of users or groups in a case.
Users who are yet to acknowledge the security memo are represented with the
Users who are assigned the 'Floating user' role are represented with the icon.
Users who are assistants to timekeepers are represented with the icon.
User in conflict with the case as a conflicted user or by virtue of being on an opposing team set are represented by the icon. Where a banner advising of Excluded Users is displayed, selecting this indicator shows the details of why that user is excluded from the asset, and provides links to the applicable items.
Users who have time limited access to the case are represented with the icon. Hovering the mouse over the icon displays the period till which the user has access has access to the asset. It helps you decide if you want to extend a user's access to asset.