This description doesn't seem to be correct:

http://www.wikimatrix.org/wiki/feature:sisterwiki

I thought "SisterWiki" was a software feature or only available at some wiki farms.

I would like to have red links (for not yet created pages) automatically "redirect" to the Wikipedia article of that name.

This is my wiki http://lumeniki.referata.com/wiki/Main_Page

Is that possible using a hosted wiki?

How about if I were installing the wiki software myself?