Make visible or invisible certain fields in forms

System

Hi,

I am using teamsite 6.5

I want t create a form with all fields visible to Master account and to hide some fields in my form for editior and author or content publisher accounts.How to code in the datacapture.cfg so that the datacapture.cfg dynamically changes based on user accounts.Is this funcionality is possible in interwoven.If it is possible kindly give me an sample or hint how to start with this.

Thanks in advance