3
I think that this will be not TOO complicated. I never looked into these modules, but I think it will work like this:
It is important, that the user-id of the one that submitted the information is saved to the database. On the page where the informations are displayed the user-id of the current user must be retrieved and compared to the submitter-id.
I think! the displayed information will be passed to templates with xoopsTpl-commands. In the php-code you have to make an if-statement: if submitter-id and viewer-id are the same then set the xoopsTpl-variable with the value, else set xoopsTpl with value false.
Now you have to change the templates where the information have to appear. It works like this:
<{if $passedvariable != false}>
show the user-specific information
<{/if}>