A Workgroup in SailPoint IdentityIQ is a collection of users or identities grouped together for the purpose of task assignment, workflow approvals, or certifications. Workgroups are not typically used for automatically creating multiple groups based on the values of a single identity attribute. To achieve automatic grouping based on identity attributes, you would need to use dynamic roles or possibly rule-based population. These methods allow for creating roles or groups dynamically by evaluating identity attributes and assigning memberships accordingly.
Reference:
SailPoint IdentityIQ Administration Guide (Sections on Workgroups and Dynamic Roles) SailPoint IdentityIQ Configuration Guide (Role Management)