You can now make use of the search-settings and buttons to find a specific route of an author. Each author/user has his/her own route-page.
You can play with the settings to find a specific route of that author. You might be already familiar with that set of tools on the general search page of RouteYou.
You can expect in the near future also extra options on the general Search page to select a route of a specific user or of routes of your own.