Yes. In SuiteFlow, the term user dynamically defines whoever performed the action that caused a workflow instance to initiate on a record. A user can be an employee, the employee’s supervisor, or any other user who performs the action in NetSuite that initiates a workflow instance.
For example, in one state of a workflow, the user might be the employee filling out a travel request. In another state, the user might be the employee’s supervisor, who must open the travel request to approve or reject.
The following screenshot shows a Send Email action. In this example, the user in the From Field is the user who is currently working with the record, indicated by the Current Record value of the Record dropdown list.

A portion of the Send Email action showing the Parameters section settings. User is selected in the Field drop-down list, which is highlighted in the screenshot.