It's not possible for now, at least for Gluu Server CE (I believe some future plans of implementing this feature in other flavours of it were discussed before; may be my colleagues will be able to expand on this). Just wanted to note that the actual backend services accessible from outside world are not running under root user (at least, they shouldn't). You can verify this by yourself by moving into container and running `# ps -aux | grep -i 'java\|httpd'` command. Most of them run under `jetty` user, OpenDJ is under `ldap` and Apache is under `apache`.
You need to be a root to start, stop and access container, for maintenance purposes only.