I think you can do it! Give this a try...
And the Kanban app to the page of your choice.
Go to app settings and paste the query: (Tasks.Owner.Name contains "nonamesleft")
or alternatively you can use this one: (Tasks.Owner = "nonameleft@noname.com")
It also works with the Portfolio Kanban Board app if you modify the query:
(UserStories.Tasks.Owner.Name contains "nonamesleft")
(UserStories.Tasks.Owner = "nonameleft@noname.com")
:-)