There are two windows...
1. Threads
2. Tasks

There are a couple options to consider.
1. Map the 'Task.CurrentId' to a 'ConcurrentDictionary' (similar to that already mentioned)
2. Try and leverage off the Thread name. (as shown below)

You can set the thread name so that it will display in the debugger window..
The Tasks window should already contain the stack frame on where it is being called from.