Independant network site login - is there a way?

Hi and good morning.

Can anyone tell me if there is a way to log into a network site, without being redirected to the main site?

I have created a log in page for one of my network sites but it re-directs back to the main blog for log in, not good.

This guy explains better in this post, but there are no answers to the dilema...

So, is there a plugin within wpmudev that will do this job or is there another way round it?

Many thanks in advance,
Regards, wayne.