Document suite wildcards for multi application setup

Author: Naktibalda

docs/08-Customization.md

@@ -485,6 +485,23 @@ You should also specify the path to the `log` directory, where the reports and l
 
 > Wildcards (*) can be used to specify multiple directories at once.
 
+Since Codeception 4.2.0 it is possible to execute specific suites from multiple applications.
+
+{% highlight bash %}
+
+# Run unit suites from all included apps and NOT the root suite
+codecept run *::unit
+
+# Run unit and functional suites from all included apps and NOT the root suite
+codecept run *::unit,*::functional
+
+# Run included unit suites AND root unit suite
+codecept run unit,*::unit
+
+# Run included unit suites and root functional suite
+codecept run functional,*::unit
+
+{% endhighlight %}
 
 ## Conclusion