Adding to Nic's answer: If each user has write access on their pages, but can read everyone else's, you can use excerpt / transclusion macros to render information from these pages on other pages.
Maybe the Page Properties Macro and the Excerpt Macro may support your use cases out-of-the-box. If not, there are third party add-ons to support multi-excerpt or other handy features to grab information from one or more read-only pages to render it in another page.
One solution could be the Display Table Macro from the commercial projectdoc Toolbox for Confluence server. Every line of a table would be stored in a properties table (using the Document Properties Marker Macro) on its own page (for instance tasks with some metadata like owner, short description, and due date). The Display Table Macro allows then to list all (matching) pages on one table (such as the overview over tasks that selects information from all matching task pages).
Two things (at least ;-)) to consider:
Biased alert: I'm one of the authors of the projectdoc Toolbox (which is available on the Atlassian Marketplace). The online manual provides more information about the tools of the projectdoc Toolbox.
You need to find a solution, where the data for the restricted columns is not stored as part of the page. This is because - as Nic explained - a user either has certain privileges on a page or not.
Therefore the mentioned solution using transclusion/excerpt is a valid approach. If this does not fit your requirements I suppose you need to find or write a plugin that stores column data apart from the page. I do not know of such a tool.
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Atlassian market place contains number of Apps/Addons which improves the capability of out of the box Atlassian products. It is good to follow a plugin evaluation process before install add-ons. So t...
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