When you first log in to a Trusted Extensions session, you specify whether to operate at a single label or at multiple labels. You then set your session clearance or session label. This setting is the security level at which you intend to operate.
In a single-level session, you can access only those objects that are equal to your session label or are dominated by the label.
In a multilevel session, you can access information at labels that are equal to or lower than your session clearance. You can specify different labels for different workspaces. You can also have multiple workspaces at the same label.