how would you make a block conditional only appear if you were viewing say this link:

 https://invisioncommunity.com/forums/forum/307-community-led-resources/ 

You need to make a condition to see where you are. Something like:

{{if \IPS\Dispatcher::i()->application->directory == 'forums' AND \IPS\Dispatcher::i()->module AND \IPS\Dispatcher::i()->module->key == 'forums' AND \IPS\Request::i()->id == XX}}
	Show
{{endif}}

where XX is the forum ID.

This block will appear only in this forum.

NOT TESTED.