I prefer to use Plan View to manage my work, but normally there is no way to hide everything that is not assigned to me. I assume a filter can be added to "Project Configuration/Configuration Data/Planning/Plan Mode Elements/Filters" by adding something to "Process Configuration Source", but I have no idea what the syntax would be to add a filter for anyything not owned by the person logged in.

I did try the "My Work" window, but the only grouping option there is by color. I can't group by parent/child relations there.