Authorization to display Net Value in VA03 for select users based on Role

Hi Friends,

We have a requirement where, for users having a specific role, under VA03 transaction (sales order display), ‘net value’ should not be visible. Our client is on SAP version 4.6C.

Though we found enough literatureon how few condition types can be masked for select users, any specific inputs
on the below are highly appreciated:

1. User exit/Screen exit to be modified for VA03 (MV45AFZZ etc.)
2. Authorization fields & objects already available for this
3. Any pointers on the include(s) to be created/used along with program details

Ideas on alternative means to achieve this (like creating a transaction variant for VA03, creating copy program with required fields masked etc.) are welcome if shared with details on approach, limitations etc.

Regards,

Jagan