Can I create a simple effective filter using config file flowgger.toml?

[peterwa88]

Using flowgger.toml mentioned in configuration documentation, how can I create a filter in the configure file in order to allow certain information to be re-sent out, e.g. blacklist a type of device, or whitelist a device name that only allowed data can be re-sent, all other data is blocked?

Suppose data follows rfc3164 standards.

Thank you!