This can be accomplished by the user sending a blind copy to themselves and then setting up a rule to move the file when the blind copy arrives at their mailbox. To set up the rule, goto tools and then rules. Give the rule a name. Mark only the option for received. The item type should be set to mail or mark other items if desired. Click on the "Define Conditions" button. The first box needs to be set to "Bc" in order to have it look at the blind copy box. The second box should be their name as it appears when they enter their name in the blind copy box. Save the condition. Next, add an action. The action that you want to select is the "Move to Folder" action. When you select this option you will be given a list of folders to choose from. Select the folder that you want the arriving blind copy to be moved to. Save the rule and enable and run it. The next time they send a blind copy to themselves, it will automatically be moved to the folder that they designated in the rule.
Hope this helps!