You have set up recruiting groups and asociated them to operator fields in job requisition . When you try to fill up an operator field , you are able to select anybody from employee pool rather than the specific set of users from the group.
Reproducing the Issue
Go to Recuiting.
Create new Job Requisition .
Short requisition page comes up asking for details.
For a particular operator role click on "find user" .
You are expecting a set of users defined in the particular role , but you are able see the entire employee pool.
The issue is not a defect but it's a configuration issue.
In provisioning in company setting enable "Person-Employment-User V1 [Not Ready for Sales/Production]"
Go to Provisioning -> Company Settings -> Enable the below option
Recruiting Group, Find user , KBA , LOD-SF-RCM , Recruiting Management , How To