Hi Venkatesh,
You can do that using sap config mode by adding "?sap-config-mode=X" at the end of URL.
This will allow you to hide the reject column from settings and make a transport of it. Further in the end user role, if you will restrict user from changing settings, it will work.
For more details, refer to this linkSNC Extension Guide: Hiding Columns in a SNC ALV Grid for All Users
Cheers,
Shekhar