Concatenation of data from multiple realm

I want to enable my users to view private task and global one in the same view.
To achieve that I need to concatenate two realm results, I know I can do it by converting both realm results to array and then merging them, but I lose the lazy load of data.

Is it possible to concatenate two realm results while maintaining the lazy load? (After the merge I want to filter between completed and not completed task and so on)