Allow posting sites only in selected categories/folders
ChimpRewriter allows posting to multple WP sites and you can currently manually select which sites it posts to.
However, if you have a lot of sites in different niches, you'd want these grouped according to niche and select only specific groups to post to. I currently have over 100 sites in different niches, and adding more daily. Selecting them manually can get tedious when you post a lot.
This feature exists already. Use projects to group different sites. Right click the active project and select “New Project”. You can have an unlimited number of projects. Each project can have a different list of sites. Use import/export to copy lists between projects. Right click the project and select “Default project” to activate.