You would like to pass the Requester details in a Service request to the Customer associated item selector.
1. In the request offering from the request name drop down, add an additional field employee = record identifier.
2. Create a hidden text field, called employee recid. Have an expression fill employee record identifier and have it triggered by the selection of RequestName.
3. In the request offering workflow, use an update block. Set ProfileLinkRecID = HiddenRecID and put ‘Employee’ for ProfileLinkCategory.