Diesel has API Gateway capabilities: you can quickly define routes and coreograph microservices and expose them as higher-level microservices, control traffic, get reports etc.
You can define a rate limiting group say
group1 and then configure rate limiting for this group, based on path or header (for REST API flows), with these messages:
$send diesel.apigw.limit.path ( group="elkpt", regex="/diesel/rest/.*/elkpt/.*", limit=10)