If you set up a TweetReach snapshot report or Tracker to search for @username, that will only return mentions and retweets of that Twitter account. So, that might be what you’re looking for. But if you’d like to see tweets to and from that account, add in the from:username query, like this:
@username OR from:username
This will make sure we pull all mentions, retweets, and replies to your Twitter handle, as well as tweets from your account. That’s the best way to see the full set of interactions with a particular account. Want to see it in action? Here’s an example.