[Groxx]

I've only seen across-the-board, though you can allow individual apps to bypass the filter entirely. I think it's just a filter on DNS requests, but for APKs from github:

    settings -> backup -> import hosts file

You may also need to enable traffic filtering, I forget. that's at:

    settings -> advanced -> Filter traffic + Block domain names

The github apks notify you about updates and link right to the download page, so they're pretty painless to use.