I am setting up a Web Form in a Dynamics customer self-service portal, the web form must have multiple steps and flow through the steps based on certain conditions. For example I am trying to set up a condition step after step one and check the value of a lookup field. Let's say the lookup field I want to check is the case subject field, if a specific subject is chosen I want to go to step 2, otherwise I will skip to step 3. How would I write the condition to check it? I've seen the standard Microsoft documentation and it only gives very basic examples with nothing about lookup fields.