Use built-in Service Bus connector to access topic

[Wi-Five]

Hi,
is it possible to use SAS-tokens or MI to access a certain topic with the built-in service bus connector in LA Standard? I know it's possible if you have granted access on the namespace level of a Service Bus but as we would like to use more granular rights it would be nice if you could use the connection string to the specific topic just like you can with LA Consumption or with the managed connectors.
VNET is enabled and I have tried both amqp and amqpWebSockets.

Thanks,
Daniel