SubstringFilter can match against an array.

lib/filters/filter.js

@@ -56,3 +56,19 @@ Filter.prototype.toBer = function(ber) {
   ber.endSequence();
   return ber;
 };
+
+
+/*
+ * Test a rule against one or more values.
+ */
+Filter.multi_test = function (rule, value) {
+  if(Array.isArray(value)) {
+    var response = false;
+    value.forEach(function(v) {
+      if(rule(v)) { response = true; }
+    });
+    return response;
+  } else {
+    return rule(value);
+  }
+}

lib/filters/substr_filter.js

@@ -81,7 +81,7 @@ SubstringFilter.prototype.matches = function(target) {
       re += this['final'] + '$';
 
     var matcher = new RegExp(re);
-    return matcher.test(target[this.attribute]);
+    return Filter.multi_test( function(v) { return matcher.test(v); }, target[this.attribute]);
   }
 
   return false;

tst/filters/substr.test.js

@@ -78,6 +78,16 @@ test('match false', function(t) {
 });
 
 
+test('match any', function(t) {
+  var f = new SubstringFilter({
+    attribute: 'foo',
+    initial: 'bar'
+  });
+  t.ok(f);
+  t.ok(f.matches({ foo: ['beuha', 'barista']}));
+  t.end();
+});
+
 test('parse ok', function(t) {
   var writer = new BerWriter();
   writer.writeString('foo');