RE: Hiding Columns based on row values
                     
                    
                      
                        Hi
not on you can obscure a column common to several rows
meaning, since it is common to rows, how can you make it appear for one row and not for the other?!?
you could instead use customisation to make the value obscured for a particular row
that's what I would do:
create a variable of the same data type as the field you want to make hide or show.
in the onaftergetrecord of the page you assign to that variable a blank value if your flag is up, otherwise you assign it the value of the field you want to show.
this variable you expose as a column within the page instead of your field
check my answer if it helped you, thanks
DAniele