User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:39.0) Gecko/20100101 Firefox/39.0 Build ID: 20150808175321 Steps to reproduce: Thunderbird's Address book contains no options for filtering addresses based on the Account being used for that system. "Home" Addressbooks get merged with "Work" address books. Actual results: When trying to compose to a contact using Thunderbird's Autocomplete feature, The E-mail was inadvertently sent to the wrong person because Thunderbird autocompleted the name from a Home Address Book. When I went to change this in Thunderbird's Preferences to limit it to a specific address book, the only option was an LDAP tree, or all Local Address books, not a Specific Local address book. Expected results: Allow on a Per Account or identity basis the filtering of users by to specific addresses. This should be added to the configuration dialogue. For each account, you should be able to select addresses for that account to draw from from the list of subscribed addressbooks.