Please add a bar above the process table column titles. Above each title put an empty edit box. When the user types in the edit box, please filter the rows match. For example, if I type cmd in the edit box above the "Process" column, then only processes with the name "cmd" in it would show up. This could be cmd.exe, cmdHelper.exe or helpCmd.exe.
Please make the filtering as powerful as Excel. This means I could filter on processes with a priority < 8 or a private bytes > 10,000 K.