Dear Jason
short answer; yes you can do something. May be this is nearly the same question as raised by you some time ago: http://scn.sap.com/thread/3416918
A "similar" thread is this one: http://scn.sap.com/thread/3279774
Therefore shortly: we have to differentiate between identifiers on level of spec as part of hitlist and of spec as part of e.g. composition or spec listing. If i remember correct different identification listings are used (but not sure about that; never investigated once again). There are some standard identification listings in the system which are used at different places. A very long time ago we have analyzed them.
You have e.g. D_HITLIST etc. check this quite old link whifh i found by hazard:
As EHS has growed there are now more identification listing in place (e.g. for inheritance, ....). But there was never the need to analyze once again.
Best approach is: either (if possible) adapt the identification listing as used or create an own putput variant based on SAP original one an change code (and therefore behaviour of this) so that may be you can select identifiers to show up in output (never done it like that but may be the user will be satisfied and technically it is possible).
Hope this helps.
C.B.