I think you would need to eliminate tabs (only show one tab, which makes the tabs at the bottom disappear). If you have a sheet that lists each user email, then you can also add a column that would represent a different sheet. You could either put an image URL in that column or set it up as a reference to another sheet. You would then only fill the columns that each user would have access to. Both options would allow you to use Per User Data (multiusers). If you use the image option that @Muhammad_iqbal describes then you can link each image to a screen and an image would only show for the users that have that column filled with an image URL. If you use the reference option, then refer to my post here, which explains how to do this with multiple inline list.
Like @Muhammad_iqbal said, you can’t currently control tabs at the bottom of the screen per user.