Hello,
You can use the authorization object M_MSEG_LGO for storage location. You will need to update or create a new role with this authorization object (restricting st.locations).
Please also check the SAP note 523511:
523511
- FAQ: Authorization check
Also take a look of the following thread:
How to restrict users for changing goods issuing storage location in process order?
Thanks and Regards,
Mariano