You can put the table into a section - only the table not the caption of the table. In the Annex you add another section, which is linked to this section and is write protected. The content is then updated, when you use Tools > Update.
For the caption you add a reference to the table (Insert > Fields > Other > Cross-References, type Table, subtype Reference). This inserts a copy of the caption. The type ‘Table’ is available, when you have insert a caption, so that the table has got a value from the number range ‘Table’. Because the reference isn’t a own value of the number range ‘Table’, this table from the Annex will not show up in an Index of Tables. If you include the caption of the table in the section, then it generates a new value for the number range ‘Table’ and then the table from the Annex would be shown in an Index of Tables too.
Because the table in the linked section is in fact a new table, it will be count and shown as additional table in the navigator. Nevertheless it might be a solution for you.