If the eventbuses are connected then this shouldn't be a problem. The eventbus has one namespace. That means, if you send a message (m) to an address (a) from your webclient and this address (a) is registered in the component (c), which is connected over the TCPEventBusBridge. The message (m) should reach the component (c).
Here is and example with SockJS and 2 clustered vert.x Instances (2 separate JVM). The part of the TCPEventBusBridge is missing, but it can give you an idea how it can work.
https://github.com/floriankammermann/vertx-examples/blob/master/eventbus-chat (Run the Example on two JVM clustered eventbus)