Hi Kath,
What you could do is retrieve the user roles associated to the account (via association)
This will show the entire list of user roles linked to the account.
You could then add a List operation, to check if a certain role is part of this list
However, this might get broken if you decide to rename application user roles
It could be better to retrieve the specific user role from the database
And then check if the list contains this specific item
Next step would be to add a decision that uses the boolean outcome of this HasTheRole check and add a create object activity in the required flow.
Hope it helps