Limit Author posting to specific category

Hi,

I use a plugin to limit authors to post to a specific category only.
The plugin is one short page of code, yet i can’t modify it successfully to also limit authors to post to a certain announcement category only.

Is this possible? Can you shed some light on how to get this done?

Please see this plugin: Restrict Author Posting
https://www.ads-software.com/plugins/restrict-author-posting/

Thanks

Schalk

https://www.ads-software.com/plugins/scheduled-announcements-widget/