There is no way to access all of the output PFNs/LFNs for a set of jobs in one go
In the DIRAC monitoring page one can select a particular version of a production and click the "Copy output patterns as JSON dictionary" button to get a dictionary mapping the job names to their PFNs. If using the web page however there is no easy way to do this, one could use the APD package but that isn't stable yet right, @cburr? So I think it would be very handy for users if they could, for a filtered list of jobs in a production, download a JSON dictionary where each job maps to a list of its PFNs.