Lock track/s during pattern switch

No. The closest you will get to that are the various “transition tricks”:

http://www.elektronauts.com/t/the-crossfader-transition-thread-tips-tricks-etc/4073

and

http://www.elektron-users.com/index.php?option=com_fireboard&Itemid=28&func=view&id=218281&catid=9&limit=10&limitstart=0

http://www.elektronauts.com/t/biologiks-part-transition-tip/1296