You'll need to find a different solution.

If it's important that individuals can only open "their" sheet(s), Excel
has nothing that will prevent someone savvy enough to find these
newsgroups from bypassing any internal protection. Especially since
you're presumably dealing with people with at least moderate technical
ability.

See

http://www.mcgimpsey.com/excel/removepwords.html

and

http://www.mcgimpsey.com/excel/fileandvbapwords.html

In article ,
And1 wrote:

I want, to every of section had access to his sheet only. It can't open
different sheets. This very important.