I searched logviewer and still not get right one!
My idea is:
Open a log file with log mode, then screen split with 3 window: 1 for orignal log file, the second one for filter keyword lines (regex support). the third one is all output line of the filter output.
If cursor move in filter output line, the main window will scroll to that line and hightlight the keyword.
If user change the second window keywords, the filter output window update as well.
Any exist package has similar functionality?