Hi @Rawad_Hammad,
In short: no, this is not supported. You are right that Camunda Modeler implements BPMN 2.0. However, there are different conformance levels of the BPMN 2.0 specification. The one we are talking about here is BPMN BPEL Process Execution Conformance which the Modeler does not support. That is also not a planned feature for the future.
Cheers,
Thorben