Create a global field that has the same Value as the checked checkbox ( i.e., 1 / True / Yes).
Then in the relationships graph, create another table occurrence of the table, and join them together.
YourTable::TickBox >---[=]----| YourTable 2::Global_Ticked
Then create a portal based on the 2nd occurrence of your table – the only records that will be in that table are ones that have been ticked.
You'll probably also need to create a join between the primary key fields as well, so that only the ones for that record show.
Instead of using a global field, you can also use a stored calculation field that always evaluates to the value of the tickbox field when a value is selected. This can save a few steps should you ever need to create a clone of your file--which produces an empty global field that then needs to be re-initialized with the original value.