Thanks for the callout, @Bastien_Siebman.
@Bart_Raboin1, you could accomplish what you want using the Hashtag Automation feature of Flowsana (I’m its author).
The solution is basically described in this forum post. The difference for you would be that you’d create a tag corresponding to each of the 3 people, and then instead of a rule where the action is to create subtasks as in that post, your rule would be “If the task has tag X, assign the task to Mary Smith”. Does that make sense? I realize it’s a bit complex so let me know if not.
As a simpler variation on the above, if you didn’t mind having the user name or email address of the 3 people showing on the form, then instead of the #codes shown in that example which map to tags, you could just use the “assign to” hashtag automation feature to assign the task to the appropriate person. In that case you wouldn’t need to create any rules. Again let me know if that’s not clear and you want more info.