mojoPortal is designed for features to be self contained, there is no cross talk of features on a page, none of the included features do that and I recommend you try to do things similar to existing features. You should have one UserControl per feature that is loaded on the page and this is the entry point to your feature, from there you can link to feature specific supporting pages if needed. Inside your UserControl you can have as many other UserControls as you like but they should inside your main feature control.
I recommend study the developer docs and training videos, and study the source code of existing features.
Hope that helps,