this is same plant as in Sighting 4388218
Flowering is not vigorous
No fruits evident
Beside another Grevillea (G. rosmarinifolia)
Possibly a garden escape ?
Silke recorded presumably the same specimen Grevillea juniperina subsp. fortis here https://canberra.naturemapr.org/sightings/31523. The ACT Census of vascular plants lists 3 subspecies of G. juniperina: subsp. allojohnsonii; subsp. fortis; subsp. sulphurea. The Census lists subsp fortis as local, the other 2 subspecies as Exotic [Aust]. To my knowledge Grevillea juniperina subsp. fortis does not naturally occur on Mts Ainslie and Majura; thus most likely a garden escape.