There is a TextField \"Filter\" below the LogCat output. However, it seems to filter only the Message-column. Id like to filter Tags also. Because there are my class names.<
There's a button that looks like a green + in the upper right of the log cat window, if you mouse over it says "Create Filter" in the popup from that you can filter by log tag. It creates a new tab in log cat with the filter name you specified. Then all of the output of that tag will go to that tab and not the "Log" tab.