Hide Table in report connected to a live data set

I have a team member who beginning a report that we would like to connect to an already existing dataset as there is large overlap in the data needed.  However, my original live dataset also has 2-3 tables that are sensitive in nature and cannot be shared with the team member. 

Is it possible to hide or lock these tables so that the rest of the dataset is useable/shareable?  It seems like this is a simple thing, so I am very hopeful I am just missing it

Thanks!