Index: C:/Documents and Settings/folsom-1/workspace/IzPack1/src/lib/com/izforge/izpack/rules/UserCondition.java
===================================================================
--- C:/Documents and Settings/folsom-1/workspace/IzPack1/src/lib/com/izforge/izpack/rules/UserCondition.java	(revision 0)
+++ C:/Documents and Settings/folsom-1/workspace/IzPack1/src/lib/com/izforge/izpack/rules/UserCondition.java	(revision 0)
@@ -0,0 +1,66 @@
+package com.izforge.izpack.rules;
+
+import com.izforge.izpack.util.Debug;
+
+import net.n3.nanoxml.XMLElement;
+
+/**
+ * Checks to see whether the user who is running the installer is the same as the user who should be
+ * running the installer.
+ * 
+ * @author J. Chris Folsom <jchrisfolsom@gmail.com>
+ */
+public class UserCondition extends Condition
+{
+    private static final long serialVersionUID = -2076347348048202718L;
+
+    private String expectedUsername;
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.izforge.izpack.rules.Condition#isTrue()
+     */
+    public boolean isTrue()
+    {
+        if (this.expectedUsername == null)
+        {
+            Debug.log("Expected user name not set in user condition. Condition will return false.");
+            return false;
+        }
+        else
+        {
+            String actualUsername = System.getProperty("user.name");
+
+            return actualUsername.equals(this.expectedUsername);
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see com.izforge.izpack.rules.Condition#readFromXML(net.n3.nanoxml.XMLElement)
+     */
+    public void readFromXML(XMLElement xmlcondition)
+    {
+        XMLElement userElement = xmlcondition.getFirstChildNamed("user");
+
+        if (userElement == null)
+        {
+            Debug.log("Condition or type \"user\" requires child element: user");
+        }
+        else
+        {
+            XMLElement requiredUserElement = userElement.getFirstChildNamed("require-user");
+
+            if (requiredUserElement == null)
+            {
+                Debug.log("Element \"user\" requires child element: require-user");
+            }
+            else
+            {
+                this.expectedUsername = requiredUserElement.getContent();
+            }
+        }
+    }
+}
\ No newline at end of file
Index: C:/Documents and Settings/folsom-1/workspace/IzPack1/src/dtd/conditions.dtd
===================================================================
--- C:/Documents and Settings/folsom-1/workspace/IzPack1/src/dtd/conditions.dtd	(revision 2220)
+++ C:/Documents and Settings/folsom-1/workspace/IzPack1/src/dtd/conditions.dtd	(working copy)
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!ELEMENT conditions (condition*,panelcondition*,packcondition*)>
-<!ELEMENT condition (condition?|(condition,condition)|(name,value)|packid|(java,returnvalue)|(obligatory?,module+))>
+<!ELEMENT condition (condition?|(condition,condition)|(name,value)|packid|(java,returnvalue)|(obligatory?,module+) | (user))>
 <!ATTLIST condition 
           id ID #IMPLIED
           type CDATA #REQUIRED
@@ -24,4 +24,7 @@
 <!ATTLIST returnvalue
           type CDATA #REQUIRED>
 <!ELEMENT module (#PCDATA)>
-<!ELEMENT obligatory EMPTY>
\ No newline at end of file
+<!ELEMENT obligatory EMPTY>
+
+<!ELEMENT user (require-user)>
+<!ELEMENT require-user (#PCDATA)>
\ No newline at end of file