Disabling the Node based on field value in Idoc Mapping

Hi Gurus,

I have the requirement like when the field PARVW(Segment = E1EDKA1)=ZM target should not create target Node(E1EDKA1)

Source is getting multiple value like PARVW = ZM, AU, EM etc.

Result should be like below.

Source Target

E1EDKA1 E1EDKA1

--- ----

---- ---

PARVW = ZM PARVW = AU

E1EDKA1

---

----

PARVW = AU

Please suggest how to do the mapping.

Thanks,

Satish.