Thanks Vignes and Murli .
But here condition is little different .
i have to subtract old value from new value which are from table in container and if the difference is less then some value then i have to put condition that workflow should not trigger .
that i am trying to do in FM added in SWEC , but not getting aapropriate code that will stop triggering for workflow . ctually i am changing condition in VK11 transaction and for that workflow is triggering .