R12:HOW TO DYNAMICALLY CHANGE THE WHERE CLAUSE OF A DFF VALUE SET????

Hi All,

 I have a requirement for the following

1 DFF is enabled in PO distributions 

This DFF is assiciated to a value set - which has a where clause validating against a block1.field1 when in Form1 - PO Entry form

When we go to the form 2 - PO Summary form - the same fileld1 is in a different block. i.e block2.field1 (Note the field names are the same across all forms)

When we go to the form 3 - releases form the same field 1 is in a different block i.e block 3.

Now the where clause of the DFF value set is giving errors, because the block is not the same across all forms and the DFF attributes are shared in all these 3 forms.