Gadget issue

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1. There is a gadget on the dashboard -> “Time sheet” and in this gadget logged work can be tracked, but if for example:
There are two person: X and Y, and person X create a issue type and assignee it to person Y and logs 2h which person Y currently spent on given issue, after that person Y logs work for the same issue type for himself , and after that person Y would like to see entire logged work for given issue type in gadget time sheet, is it possible?

There is a problem because this gadget display only work logged by particular person (person Y does not see work logged by person Z), there is some option in time sheet edit mode (please see attached file).
But there we can put only one person, or put more in field Show entries created by user ? If there is a possibility to pun more tan one person it can solve my problem, so could you indicate how put there person X and person Y ? or share me some other way how to solve this case ?

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