Filteration of data on form through lookup

Hi Pioneers,

I have my requirement as below:

In "SalesTable", I have to put a lookup for "SalesStatus", as when I select "Open" in lookup, the records in "SalesTable" form, should get filtered with those "SalesOrders", whose "SalesStatus" is "Open", if when I select "Invoiced" in lookup, the records in "SalesTable" form, should get filtered with those "SalesOrders", whose "SalesStatus" is "Invoiced". I am new to Ax , please guide me.