If you only want to show logcat for a specific TAG, do it like this:
adb logcat YourTAGHere:Priority *:S
The *:S is important, as it sets all other tags to silent. If I want to track only my MainActivity tag at Verbose level, the syntax would look like this.
adb logcat MainActivity:V *:S
Edit:
I found no good way of filtering out tags with spaces. LegendryEagle works fine, but I was not able to filter out Legendry Eagle