Filter which plans autorelease which items

Hi,

I am wondering if it is possible to filter which items get autoreleased by an ASCP plan.  What we would like to do is have two plans - one for purchased items and one for make items.  The ASCP plan for Buy items would have a forecast entered at the top level and explode demand to the components, and also take into account safety stock and demand.  Purchase orders for BUY items would get autoreleased from this plan, but not WIP jobs for make items.

In the ASCP plan for MAKE items, we want to autorelease all MAKE orders, but only for Demand and Safety Stock items.  We do not want to build to the forecast items.