You can get then queries like: https://trac.videolan.org/vlc/query?status=assigned&status=n...
And no, tags are not enough.
We might start to look into this again after we've shipped better issue filtering, so that custom fields can actually be used effectively. [1]
[0]: https://gitlab.com/gitlab-org/gitlab-ce/issues/8988
[1]: https://gitlab.com/gitlab-org/gitlab-ce/issues/21993
I'm not surprised, but for us, it's mandatory to replace trac (or bugzilla)
Even better if you have examples of useful fields you've used!
You can get then queries like: https://trac.videolan.org/vlc/query?status=assigned&status=n...
And no, tags are not enough.