Use either get ( accountName ) -- to identify a specific individual or get ( accountPrivilegeSetName ) -- to identify a group.
Use that with If steps to select different layouts.
This example sends users with an administration privilege set to an admin layout and those with a sales privilege set to a sales layout:
If [ Get ( AccountPrivilegeSetName ) = "Administrator" ) ]
Go To Layout ["Manager Overview"( ...
Else IF [ Get ( AccountPrivilegeSetName ) = "Sales" ) ]
Go to Layout ["Sales" (....