If you use your own classpath:settings4j.xml, then you can configure Filters for each Connector.
The default Filter implementation uses the regular-expression syntax from java.util.regex.Pattern
<settings4j:configuration xmlns:settings4j='http://settings4j.org/'>
<connector name="SystemPropertyConnector" class="org.settings4j.connector.SystemPropertyConnector">
<filter>
<include pattern="org/mycompany/testConfig1\.txt" />
<exclude pattern="org/mycompany/testConfig2\.txt" />
</filter>
</connector>
<connector name="ClasspathConnector" class="org.settings4j.connector.ClasspathConnector">
<filter>
<include pattern="org/mycompany/testConfig2\.txt" />
<exclude pattern="org/mycompany/testConfig1\.txt" />
</filter>
</connector>
</settings4j:configuration>
You can always use a list of include or exclude Elements.