Optionally split processes by user owner in report

[MurzNN]

In multi-user instance ps_mem group all process with same name to one line, even if they have different owner (user). So, if I have 3 logged in users with separate firefox process - I see the sum of all processes, and can't understand firefox from each user eats more memory.

For solve this problem can you add option for split processes by user owner in report?