opentelemetry output plugin can't handle dynamic header values

I have multitenant loki backend, I am using lua script to go thourgh opentelemetry log messages and based on certain log records , I need to make many different organization for loki using http header X-Scope-OrgID.

But opentelemetry output plugin can't handle dynamic header values.

Already tried with loki nad http plugin but I have bit complex structured metadata , so I found it's much easier to maintain them with opentelemetry output.