For your first TOC, specify that it apply only to the Style used for the Chapter headings (presumably Heading1). For your 2nd TOC, include all required heading Styles.
Make sure neither TOC is attached to a paragraph using a Heading Style.
If the Chapters require their own TOCs, bookmark the Chapter ranges, then reference the relevant bookmark in each TOC.
For the field code switches required to manage all this, see:
https://support.office.com/en-us/art...4-67754d78d05c