Hello,
once an item has been stored to db, GeniusConnect adds 2 custom fields on MAPI level, OCMPRIMNAMES and OCMPRIMVALUES.
In your macro/script you can check for this values (UserProperties) and change for example a flag/category.
Please note:
When Auto.Save is on, your change will cause an MAPI change event and GeniusConnect will resave the changes to DB.