You can reject out what you don't want to see like this, add a new filter and put this in the "By tag name" field. You can of course know the tag you want to reject from the LogCat itself.
^(?!.*(UNWANTEDTAG)).*$
This is an example of one I use:
^(?!.*(SignalStrength|StatusBar|TelephonyManager|Wifi|SignalClusterView)).*$
I now don't see any messages from those tags
Edit 1:
and this is a very long one from my library :D , you would barely see something there:
^(?!(WifiMulticast|WifiHW|MtpService|PushClient|Tethering|SensorService|WifiStateMachine|hawaii.hwcomposer|AnyDo|PowerManagerService|Monitor|IconMerger|InputMethodManager|SignalClusterView_dual|StatusBar.NetworkController_dual|LocationManagerService|Provider|SurfaceTextureClient|ImageLoader|dalvikvm|OpenGLRenderer|skia|AbsListView|MediaPlayer|AudioManager|VelocityTracker|Drv|Jpeg|CdpDrv|IspDrv|TpipeDrv|iio|ImgScaler|IMG_MMU|ResMgrDrv|JpgDecComp|JpgDecPipe|mHalJpgDec|PipeMgstatrDrv|mHalJpgParser|jdwp|libEGL|Zygote|Trace|InputEventReceiver|SpannableStringBuilder|IInputConnectionWrapper|MotionRecognitionManager|Choreographer|v_galz|SensorManager|Sensors|GC|LockPatternUtils|STATUSBAR*|SignalStrength|STATUSBAR-BatteryController|BatteryService|STATUSBAR-PhoneStatusBar|WifiP2pStateTracker|Watchdog|AlarmManager|BatteryStatsImpl|STATUSBAR-Clock)).*$