Triggering calculations for parent-dependent cons members using member filters in DM

Not tested, but P#<TopParent>.Base.Parents should give you all the parents. However, this will likely result in executing the sequence multiple times for the same parent, and for invalid combinations of entity/parent.

The workaround would be to write a Custom Calculate instead, targeting the bits you need.

For the record, unless you have a custom consolidation algorithm, targeting OwnerPostAdj rather than simply consolidating parents will not really make sense, because you're doing 99% of the same work but then not saving any result in the database.