From the Readme:
Fill a void in your Sublime Text multiple selection capabilities! This plugin allows you to extend each selection until the next instance of a search term, making it super easy to edit multiple pieces of text that are similar but not quite the same enough.
I have wanted this functionality since day 1, and I've always worked around it by careful editing and searching and regexes and moving from the end of lines instead of the beginning and so forth. But this—this is how multiple selections should be. Thanks xavi-!