I met a senior solicitor from Corrs Chamber Westgarth (mid-tier) who said quite explicitly "to be blunt, we only hire from Monash or Melbourne". He also said that having slightly lower grades from either of those universities was more acceptable because they acknowledge that they are the more competitive schools.
At the firm, the split between ex-Monash students and ex-Melbourne students was quite even among the graduate lawyers. I did meet one girl who graduated from Deakin, but she said she only got a position because she literally topped her year at law school. So honestly, for more competitive jobs it's almost a prerequisite that you attended a GO8 university unless you rank in the top few of your university.
Also, from talking to lawyers from Clayton Utz, there appears to a really heavy emphasis on grades for entering the top firms after graduation. My friend (graduated from Monash with first class honours, initially got into La Trobe after VCE and then transferred) actually got an offer from Minter Ellison as well even though he spelt their firm's name wrong multiple times in his cover letter (lol), and he's confident it was just because they saw his HD average. He also mentioned that grades were often a pre-requisite for whether your CV is even really assessed. If you meet the benchmark, then they will look at your CV and consider you for an interview.
I hope that didn't sound discouraging, but it seems tough for us
Anyway, hope that helps
Edit: typo. I don't think I've ever posted something on AN without a typo.....