I would use Word's Table of Figures feature to generate the Table of Tables. This gets its information from paragraphs formatted using the Caption paragraph style with a Table Sequence number. You need a different paragraph style in the same logical paragraph (line) for the text you do not want in the Table of Tables. Use a style separator
(Ctrl+Alt+Enter) and put the part you do not want in tables in a body style (perhaps formatted to look the same as the caption style).
This way Word does not see the rest of the line (following the style separator) as part of the caption.
A document with these features is attached.
Getting two paragraph styles in a single caption is not automatic but it isn't that hard, either. Remember, you want both to be paragraph styles, not character styles. Once you do this, the Table of Tables can be automatically generated and updated without having to be modified each time.
Understanding Styles in Microsoft Word -
Style Separator
Generating a Table of Contents - Complex Documents
BTW, this works with Cross-Referencing to a Table as well.