Resolution:
Currently in TIBCO ActiveMatrix ("AMX") composite, JMS service only supports selectors in case of multi-operation service. In case of a Single operation service, the user cannot use JMS message selectors.

In AMX multi-operation JMS service, the user can configure message selectors in the following two conditions:

1). Interface setting: Message selector on Interface Settings is configurable when Error Action in Operation Selection is not "Retain Message in Service Destination" and Operation Selection Type is "SCA".

2). Operation Settings: Message Selector is displayed only when Operation Selection Type is "Custom" or Operation Selection Error Action is "Retain Message in Service Destination" and is used as an operation selector for the selected operation.

Does JMS Service in TIBCO ActiveMatrix composite support message selectors?

Please follow the TIBCO ActiveMatrix Service Grid Documentation for more Information.
TIBCO ActiveMatrix Service Grid -> Composite Development -> Bindings -> JMS Bindings