For #1, do you mean create a custom action, click it, then just show the items that created by the logged user? if yes, Custom action cannot support it directly, but you can try to use the CAML filter. On the other hand, you also can set the ‘Searched Fields’ to do that.
For #2, do you want to group the field which its type is Date? If yes, qListView can support it. if no, please give me more detail about your case.