I've look all over, but keeps running into same info that talks about directory level IP restriction, which usually looks something like this:
Order Deny,Allow
Deny from all
Allow from 123.123.123.123
Is it possible to have same type of access restriction tied to a page/document?
For a more up to date Apache 2.4 example:
<Files file.html>
Require ip 123.123.123.123
</Files>
Here are the more in depth docs for additional options and examples: https://httpd.apache.org/docs/2.4/howto/access.html and the docs for the <Files> directive: https://httpd.apache.org/docs/2.4/mod/core.html#files
Note that
<Files>can be nested inside<Directory>sections to restrict the portion of the filesystem they apply to.