how do I actually filter the logs of the very SigNoz out?

You have deployed SigNoz on docker on k8s ?

on docker with docker-compose

So there are some limitations with filelog recever using otel collector deployed in

docker

as it doesn’t contain much metadata about the container apart from the container ID. One thing you can do is try this solution out https://github.com/SigNoz/signoz/issues/1597#issuecomment-1259234665 and use filter operator to drop logs of signoz https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/stanza/docs/operators/filter.md