Hi @epannell3223 ,
To auto-assign based on your requirements, you will need the following:
A Get Items action from the assignment list and filter by your RAU. One way you can do this by first creating the item in your task list first, then capture the RAU for your filter. Your process may be slightly different but haven't seen your flow. If you already have the RAU for the task (as dynamic content), then your filter would be:
RAU eq 'dynamic_content' -- remember this is inside apostrophes.
This is going to give you the row from the assigned list and this will give you access the dynamic content of the assignee.
Once you have the dynamic content of the assignee, you use that dynamic content to assign in your task.
As mentioned above, you can either create the task with the assignee, or if the task is already created, you can update an item with the assignee.