Can I freeze bread dough after the first rising? The bread dough that I am making calls for it to rise for 1 hour, knead for 5 minutes, then rise for another hour, shape into loaves, rise for 45 minutes, then bake.  So can I freeze the dough after the first rise?
Yes, you absolutely can - this is the common way to freeze dough, actually.  It's better to freeze after the first rise.  Often the second rise will be done in the refrigerator along with thawing; and most of the recipes I've seen skip a third rise (so you freeze the dough shaped, and you're rising in shaped form alongside thawing plus a warming stage while you preheat the oven).

See for example this guide to freezing different doughs; or King Arthur Flour's article on the subject.