Direct discrimination occurs when people are treated less favourably because of their actual or perceived sexuality e.g. denied employment because of actual or perceived sexuality.
Indirect discrimination occurs where a policy, procedure or practice, applied equally to all regardless of sexuality, has a disparate impact on people as a result of their sexuality. For example, defining family as heterosexual in family policies.
Harassment is behaviour that offends, humiliates, intimidates or creates a hostile environment and is a form of discrimination.