I have a project in mind, and I don't know if I can do it with Discourse

[RGJ (Richard - Communiteq)]

@skizo

Subdomains point to categories

That won’t work.

@skizo

Second: In a one vps to install three discourse forum (is it posible? what requetiments?). One forum for each web. Subdomains point to a diferents discourse installations. Thus, a user must register in each forum, or can you use them all with a single record?

You can set it up as “multisite”, where one installation can host multiple independent Discourses.

@skizo

Thus, a user must register in each forum, or can you use them all with a single record?

You can set up one instance as the DiscourseConnect provider and have the others SSO towards it.