I'm not a programmer, so next suggestion may be wrong.
Looking around your code and OX6 RMI, i see a function you can use to get username from an User object and include in the search:
http://software.open-xchange.com/OX6...#getName%28%29
\OXadminGUI\src\java\at\sciencesoft\controller\use r.java
Code:
com.openexchange.admin.rmi.dataobjects.User u = ulist[i];
StringBuffer buf = new StringBuffer();
buf.append(u.getId());
buf.append('\n');
[B]buf.append(u.getName());
buf.append('\n');[/B]
buf.append(u.getDisplay_name());

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