Your question is a bit difficult to understand, but do you mean you want to connect 3 different Approvers to an Employee entity? If this is the case, you have to create 3 different attributes or associations for the 3 Approvers.
Then in your form you show 3 fields that all connect to the corresponding Approvers.
Hope this helps!
Please add picture of your domain model & the attributes of employee...maybe that makes things more clear.
It sound slike your are trying to solve somethings with ID"s that I would solve with 3 associations from employee to employee. Employee_Employee_Approver1,
Employee_Employee_Approver2,
Employee_Employee_Approver3.