Filter - Has Tag
This filter allows you to put people in different paths in a Flow based on whether they have a particular tag or not.
To set up the step simply select the tag. If you'd like to narrow down the filter with more tags, simply create another Has Tag step and connect them to each other.
Save the step and connect the "Yes" and "No" links to another step. Note that you don't need to connect both the "Yes" and "No" links.