Transfer posting in specific storage type in WM

I have configured the IM Movement  311 to map to a new WM movement type 998 and the business request is that only the inventory in a specific storage type 005 would be considered. Everything works great when all inventory is stored in storage type 005 when there is inventory stored in multiple storage types then we need to go thru the LU04 transaction. In OMLY I've defined a reference storage type search and mapped only storage type 005, but it doesn't appear to be being used.