Application.cfm or a .cfc

I'm working on updating some apps we currently use for AD user maintenance. i.e. add new users, unlock accounts, reset passwords, etc.)

We use cgi.auth_user and then parse that to get the domain and userid of the Windows user accessing the app. We then take the user id portion of that and use that as the filter in a cfldap query. that pulls attributes we use to control access, and timestamp transactions.

That cfldap query is included in a number of pages throughout the app and I wanted to move that to either the Application.cfm file, or create a .cfc file (something we're not currently using) and put it there.

We're on ColdFusion 11, are there advantages/disadvantages to either of these methods?

Mahalo;

Charles