Add a filter that applies to all of the tables on the page

Here are some topics where this is discussed.  I think you’ll find an answer here: 

https://community.skuid.com/t/add-global-filter-on-top-of-page-that-apply-on-multiple-…

https://community.skuid.com/t/cross-model-linked-conditions

https://community.skuid.com/t/filter-calendar-by-user-using-the-action-framework  (This intoduces the concept of “arbitrary filters” where one field selector controls a number of models through the action framework.  The example is with a calendar,  but it can be used with any model-bound component.)

Here is some XML of an opportunity dashboard where one set of selectors controls a model using the action framework.  It could be expanded to control multple models. 
https://raw.githubusercontent.com/skuidify/SamplePages/master/ActionRecipies/Arbitrary%20Filters%20-…

Hopefully these resources get you going.