Wakers, look through the Tierdatenbank, the database of homeless animals referenced upthread. One of the critieria you can filter on is 'Wohnungstier' - this would give you a starting point for individual cats who have been assessed as best to live as indoor cats. Note that the assessment is based on the individual, not rescue policy or philosophy. http://www.tierdatenbank.ch/cms/tier...unschtier.html
But before you do - the indoor/outdoor cat issue does indeed seem to be a cultural difference here in Switzerland. (I'm not a cat person, know nothing about cats, have only tangential contact with cat rescue folks - therefore the 'seems'.)
As you approach rescues here, it might be a good idea to read through the 'official' stance on cat welfare, from the BLV's website. This might give you a better understanding of the Swiss perspective . Understanding the cultural difference could make it easier to discuss the issue with a rehoming coordinator. Specifically read the 'Katzen und Auslauf' and 'Wohnungskatzen' sections but also go through the rest of the cat pages. Lots of good info about 'the Swiss way' there. http://www.meinheimtier.ch/de/katzen
While outdoor seems to be strongly preferred there are always individuals who have been assessed as indoor - these are where you should concentrate your search.