Network namespaces and D-Bus

[friesia]

My apps cannot use D-Bus functionality when launched in a different namespace.
For example, if I launch Chromium inside a network namespace that uses a default route through VPN, Chromium can no longer access KDE's proxy settings.
I use another instance of Chromium which uses default namespace and another user profile. It does well.
Apps like KTorrent don't start at all.
Is there any workaround for this?