Actually I do not have such an evaluator, but based on usage recommendations from here:

https://github.com/qos-ch/logback/pull/244

it takes the string going after full and filter out stack trace by its occurrences. If not nested into %replace, expressions like following are working just fine:

%ex{full,
          java.lang.reflect.Method,
          org.apache.catalina,
          org.springframework.aop,
          org.springframework.security,
          org.springframework.transaction,
          org.springframework.web
        }