BTW, "The Lautenberg Amendment" isn't law yet ... however, in some states teh forms for filing for divorce include checkboxes that, once filed, issue restraining orders against BOTH parties ... things like can't remove the child from the state, etc. But in this case, I think, an additional one was filed because of reasons posted earlier.
My understanding is that in Texas the law reads that if you have a restraining order against you, it is illegal to posses firearms.