Use information barriers to control information flow between internal groups of users in order to avoid inappropriate communication that could violate compliance rules.
To configure information barriers, select Information Barriers in the Admin Portal under Compliance (Figure 1):
Figure 1 Information Barriers
Select the Group Management tab (Figure 2):
Figure 2 Group Management
From here, select Create an IB Group and assign users to the group by searching for them in the Membership tab.
Once you’ve created your groups, you can activate a block policy between specific groups by selecting the Policy Management tab and selecting Create IB Policy.
Further information on information barriers can be found here.