Here youcan configure Prosody <a href="https://modules.prosody.im/mod_firewall" target="_blank">mod_firewall</a> module. Youcan create multiple configuration files bellow, and change their order. Don't hesitate to share your configurations withthe community (for example by adding some examples in the plugin documentation).
Warning: mod_firewall is disabled in the livechat <a href="/admin/plugins/show/peertube-plugin-livechat" target="_blank">plugin settings</a>, you have to enable it if you want this configuration to be taken into account.
If youcan't make it work, youcan use the diagnostic tool (there is a button on top of the plugin settings page), and take a close look onthe «Prosody check» section.