Try:
SELECT T0.[DocNum], T0.[PostDate], T0.[DueDate], T0.[ItemCode], T1.[ItemName], T0.[PlannedQty], T0.[CmpltQty], T4.LineTotal
FROM OWOR T0 inner join OITM T1 on T0.[ItemCode]=T1.[ItemCode]
left join ORDR T3 on T3.[DocNum] = T0.[OriginNum]
left JOIN RDR1 T4 ON T4.DocEntry = T3.DocEntry AND T4.ItemCode=T1.ItemCode
WHERE T0.[PostDate] between [%0] and [%1] and T0.DocEntry in (SELECT T2.Docentry FROM WOR1 T2 WHERE T2.[ItemCode] like '%labor%')