Sv: Some noob questions :)
Hi,
yes this is possible in Tiki.
The Tiki security hierarchy is: global/group -> category -> object. Meaning object rights override category rights, which override global right.
To limit the tutorial to one company. Create a group for the company which needs access, create a category and assign all tutorial pages to that category. Then assign the rights to the group in question, but not others, to that category.