There is/was a community around Taize activities in Vienna, but thethey don´t seem to be very active anymore. Many informations and activitiy dates in the net are very outdated
(eg. nothing new since 2013).
The only thing which could be active to this day (could) is
A weekly Taize prayer,
each Wednesday 19:00 (except Christmas week)
in the St.Ruprechts church 1010 Wien. (GoogleMaps)
A contact mail address is given, if you want to ask if this is still valid: [email protected]
Nearest stations of public transport is Schwedenplatz
of subway lines U1 and U4 (or station Morzinplatz by Bus).
Source
Source (in german) eg. Jugendtreffen.info (and more sites saying the same thing).