So I looked around to find a better solution for this. And I did! The guys of joomlaxi.com did a fantastic job (by the way the still do it, because there support is really good!) creating this fabulous XIUS component.
You have got so many features – that are missing at jomsocial – with XIUS like: age range search, geo searching, userlists and so on. Also you can build your own search mask with your own preselected jomsocial fields. But not only jomsocial fields can be added, you can also implement for example Joomla fields, like user ID and than can search for it.
Really fantastic, I must say it again. This component is really a must have for every social network community. A+++