Hi,
try something like..
Var=if(merged object=Uni.object) then "Hide" else "show"
make Var variable as measure.then apply the report filter on Tab 1 where Var is equal to show.
with this you can exclude the values from universe object.
if above one will not work then try with this.
Var1=if(not(isnull[uni.object])) then "Hide" else "show"
apply the filter in tab 1 where var1 is equal to show.
make it measure variable.
Amit