Enabling Custom certificate for multiple projects in Keda Operator and Keda Api server

[harikumars]

We have created scaledObject in our project/namespace to scale pods based upon solace topic size. The AuthenticationRef for the ScaledObject we have created a TriggerAuthentication in our project/namespace which using HashiCorp Vault for retrieving secrets.
The Keda Operator and Keda Api POD's/Container in keda namespace is using self signed certificate.
how to apply cert with respect to each project ? is it currently supports custom cert to be used across project/namespace ?
However we want to use the custom ca certificate specific to project name. is it possible to have separate custom certs configured under the keda operator for each project ?