Aylien Sentiment Analysis of a single user account on Twitter

Hi,

I've been looking through tutorials online and haven't found anything about a delimiter that will let you do a sentiment analysis of a single twitter account, or maybe pull tweets from x, y, and z twitter accounts to compare their sentiments.  In other words, can you scrape twitter according to from-user(s) rather than a search term within the texts of tweets?

Thank you.