The Boolean connector can seem a little weird at first because it doesn't use obvious boolean logic language like you might see in programming languages.
For instance, you might be looking for a setting for TRUE or FALSE. You might also be looking for a place to set OR logic or AND logic.
The Boolean connector can accomplish those things if you understand how the input panel works.
To check if something is True:
The Boolean connector has an area to set up a comparison. If you want to see if a value is equal to the boolean value True, check the box next to 'The 2nd of 2 values to compare':
If you want to see if a value is equal to the Boolean value False, leave the box unchecked:
You can also use the comparison settings to see if one value is equal to another. In this example, the Boolean connector is checking if an incoming Slack message was posted to a specific channel. In this case, the 2nd value is the channel id:
You can also check the box to make your comparison case-sensitive if necessary.