Hello,
this should be possible using metadata:
SAP Implementation Guide > SAP Supplier Relationship Management > SRM Server > Cross-Application Basic Settings > Extensions and Field Control (Personalization) > Configure Field Control > Configure Control for Fields of Substructures > Metadata for Fields of Substructures and Table-Like Enhancements
Concerned set type is '32' and field is 'ONLY_IV'.
If it does not work, use enhancement spot WD_BADI to hide this field.
Regards.
Laurent.