There is a good news for LG Nexus 4 and CyanogenMod lovers that CM team has announced CyanogenMod 10.1 Nightlies is available for Nexus 4. Previously there were few unofficial CM 10 version for Nexus 4 were made so the CM team come up with an official release but even they said that there will be no ETA. To install nightlies in your device then it should be rooted first before you proceed further more. If its not then try the All in One toolkit for Nexus 4 to root your device with easy steps.
Here what CM team said on their Google+ Page
The new Nexus
We noticed a few random third-parties building CM10.1 for the new Nexus devices, and people actually using those builds… 🙂
Since there’s a demand for it, today we’ve started rolling out nightly builds for themako (Nexus 4) at http://get.cm/?device=mako , and the manta (Nexus 10) will join in as soon as it’s ready. The rest of the devices will still be getting 10.0 (Android 4.1) builds until we finish merging 4.2 and flip the switch for everybody.
As usual, no ETAs. Thanks for not asking 😀
You can download the ROM from the link provided above in the quote, do share your experience with us.
Source: CM Google+