If multiple authors write for your blog, you can now easily post the articles written by each author to different destinations. For instance, articles written by each individual author to be automatically posted to their respective twitter accounts.
To route by author:
1) Log into your dlvr.it account
2) Click on the Feed you wish to add filters to
3) Click on Settings
4) Click on the Filters tab
Select "Author" and enter your filtering terms.
Note: You have the ability to filter by other categories by clicking on the toggle switch for the other filters and entering the Filter criteria.