---
title: sourceFilter
framework: network
role: symbol
role_heading: Instance Property
path: network/nwmulticastgroup/sourcefilter
---

# sourceFilter

An optional address endpoint you provide to filter received multicast packets.

## Declaration

```swift
final let sourceFilter: NWEndpoint?
```

## See Also

### Inspecting Multicast Groups

- [members](network/nwmulticastgroup/members.md)
- [isUnicastDisabled](network/nwmulticastgroup/isunicastdisabled.md)