it is possible to insert more than one tag in the "Retweet" field to retweet only for one tag not for all of them?
can i seperate tags by comma or by space? How does it work. Maybe it would be fantastic to put this informations about Retweet also Tweet Search into your manual.
Yes, for the search option the search query is a Twitter search query, this includes OR, etc.
See, https://dev.twitter.com/docs/using-search for what Twitter search supports.
The retweet option will only rewteet friend's tweets that match the keywords. It is not a Twitter search query, and is currently case sensitive. I will look into making it case insensitive.