Search for Tweets from specific users

You can do this using either the 'Twitter Search' profile or by doing a live search.

All you need to do is add the account's Twitter handle with 'from:' in front of it, eg. from:sendible.

You can also see messages sent to that Twitter account (as long as they are not direct messages) by setting up a search with '@' before their Twitter handle, eg. @sendible.