Tagging multiple EO's across the 3 govs

Summary:

Tagging multiple EO's across the 3 govs

how is it useful:

It would be useful to be able to select EO's in your city, or another city or province or at federal level across all the 3 (municipal, provincial, federal govs). Meaning, users post, then select their city, province with the option of selecting/tagging EO's from all 3 govs.