did a bit of research and found running value

Came up with : =runningvalue(count(Fields!Prog.Value),sum,nothing)

Which gives a grand total of number of programs all clients are in ..

is it possible to do something like

=runningvalue(count(Fields!Prog.Value)=1 ,sum,nothing) , so it counts only clients with one program ,

then do the same for 2,3 and 4 ?