Make Pending Approval the Default Order Status for Specific Users

1. Navigate to Customization > Workflow > Workflows > New.
2. Fill up Basic Information.
3. Set the Name to Order Status
4. Select Record Type to Transaction
5. Select Sub Types to Sales Order
6. Release Status should set to Testing
7. Enable Logging set True
8. In the Initiation section > Event Based: On Create = T
9. Click Save.
10. Click State 1 and set the Name to Pending Approval
11. Click Save.
12. Click State created > click Edit.
13. Click New Action.
14. Click Set Field Value.
15. State should be Pending Approval.
16. Trigger On set to Entry.
17. In the Parameters section > Field set to Order Status.
18. In the Condition:
Field = User
Compare Type = any of     
Selection = User XX [for testing purposes, you can select your name]
19. Click Save
20. In the Value section > Static Value = True, Selection = Pending Approval.
21. Click Save.