New BM Hunter - Advice on PvE Macros plz

I use a macro to cast a tar trap at my feet. Can I modify it to drop one at my (or pet’s) selected target if I hold shift? Ideally, it should do nothing if I hit shift and I (or pet) have no current bad guy selected. My efforts failed as it just defaults to manual target mode. if this works I would add this to my wild spirits and my flare macros.

edit: I found some old posts that say this is not possible … have things changed?