Provide code-level to attribute fields in a SDE geodatabase.

Dear,


I have an SDE geodatabase and I want to introduce code-level access to the attribute fields in each feature class restricting the attributes to the following group of users :
- Public.
- Private(Internal).

Is there any way of proceeding using ArcGIS technology products? Is it handled depending through the RDBMS ?

Please help,


Thank you !