99% chance that it's not possible and it won't be possible soon.
You can take a look at the table at https://bigquery.cloud.google.com/table/the-psf:pypi.downloa... and check out tabs "Schema" and "Preview".
Mix of country_code, details* and tls* could give you "rough" grouping, but there would probably be 100s of users in the same bucket.
It is probably designed in a way to not let you target single user that way. It's likely that there is a pipeline scrubbing small buckets to avoid privacy leaks. I had to write pipelines like this myself on different datasets.
