Disabling OR Hiding DFF on Self service responsibility shared between two users

 HI,

 I have a DFF of 6 segments which is presently displayed on the self service responsibility page. This responsibility is assigned to the Quality Incharge and Maintenance Incharge. Based of the default context value,

 the QC is supposed to view and input in only 2 fields, the remaining 4 fields should either be disabled or hidden. When the same  DFF is used by Maintenance Incharge, he should be able view and input in 4 fields and the     remaining 2 fields should be disabled or hidden. 

 I do not want to create 2 separate DFF for separating the segments.

 Please advise.

Thanks & regards

Mythili