Blog Post Macro - restrict authors

[Erin Brusnahan]

I'm trying to use the Blog Post Macro. 

The documentation from Atlassian states "To include content from one user, but exclude from another user: jsmith,!jbrown". However, the field will only accept full usernames – if I enter "jsmith" I am given the option to select "James Smith". Further, the field clears all content that is not a full username, so once I have neglected to select "James Smith" and the field has lost focus, it's cleared. This also applies to attempting to add the exclamation point – neither "!jbrown" nor selecting "James Brown" and adding an exclamation point before it work. 

Is there another way to exclude content from a user?

[L]

An easy work around is using the option Restrict to these Labels, and only blogs that have a particular label will load in the feed.

[Erin Brusnahan]

A good workaround if I wanted to have users in our company maintain separate labels based on author. I'd really just like the feature to work as described.