I believe the answer is 'no'. However, you can create a property on the org files that contains the custom week number and then create a customized org agenda view based on a search for that property. This view can be saved as a custom command in org-agenda-custom-commands.
Take a look at the variable org-agenda-files:
The files to be used for agenda display.
If an entry is a directory, all files in that directory that are matched
by org-agenda-file-regexp will be part of the file list.
If the value of the variable is not a list but a single file name, then
the list of agenda files is actually stored and maintained in that ...