Again - this may not be a good fit for a single list - I was just trying to let you know what is / is not available in InfoPath out of the box. It sounds like you have different fields needed based on other factors. If third party tools aren't an option, and if the data must go into lists (as opposed to using regular InfoPath forms that submit to a library) perhaps this needs to be split into separate lists based on the activity? In terms of filtering - if you use a list form, and set it to manage multiple items, you can leverage the query fields to only return the data you need for a specific action. But with 50 views, it sounds like what you are building is probably too complex for a simple list to support - and it seems like a lot of views for a "regular" InfoPath form as well. Could some of the views be consolidated with show / hide sections?
Hilary Stoupa
