Hi Trevor,
I had once the chance to test this module. As far as I remember… :
1. “sync users from WordPress through to the app” : They don’t share the database. It allows you to add user to WP Db but doesn’t sync the app user profile.
2. “does any of this functionality come through via the Siberian module” : Unfortunately not. Its API only read some basic functionality.
To make sure, would you please email Siberian contact@siberiancms.com and ask more detail.
Sincerely,
Ariv Ontowiryo