What might work for you is to add two reply templates. For example:
[wrap=template key="message-sally" action="create_pm" usernames="sally" title="Hi Sally!" label="Send Sally a PM"]
- [ ] task 1
- [ ] task 2
[/wrap]
[wrap=template key="message-help" action="create_pm" usernames="simon" title="Please help!" label="Get Help"]
- [ ] task 1
- [ ] task 2
[/wrap]
Let me know if I am misunderstanding what you are trying to do.
While looking at this topic’s OP, I noticed that it says username can be used as an option. The correct name for the option is usernames (with an s.) I’ll update the topic to fix that.