@netaction
We don't support exclusion of events right now, however we support filters.
You can filter the calendar by category, tag, and post.
Category format: ai1ec_cat_ids=X
where X is event category id. Separate multiple ids with a comma.
Single category: http://localhost/latest/calendar/?ai1ec_cat_ids=3
Multiple category: http://localhost/latest/calendar/?ai1ec_cat_ids=3,4,5
Tag format: ai1ec_tag_ids=X
where Xis event tag id. Separate multiple ids with a comma.
Single tag: http://localhost/latest/calendar/?ai1ec_tag_ids=3
Multiple tag: http://localhost/latest/calendar/?ai1ec_tag_ids=3,4,5
Tag+Category:
http://localhost/latest/calendar/?ai1ec_cat_ids=3&ai1ec_tag_ids=3
This is valid for monthly/agenda views, widget view, and when exporting events.